Abi, Cervical encasement, Multi-tasking and Dry SCUBA

Abi, Las Vegas Bay Lake Mead

Abi: Returning readers will remember Abigail (Abi) the 24 y/o German with auburn hair who was hired to teach an underwater bondage course at Splash and ended up as the resident Domme in charge of the Towel-Girls. She has a very high student accident rate in her classes and had another near fatality during a training session at Lake Mead when a towel-girl trainee had a buoyancy device failure at the end of her class. The students were starting their ascent when the girl punctured the bladder of her BCD on a jagged piece of metal on the wreck she was swimming around and couldn’t get off the bottom. She panicked and couldn’t drop her weights. They were using single AL 80 tanks with buoyancy characteristics of Full = -1.4lbs and Empty = 3.4lbs and the TG was wearing a 5 mm neoprene suit so she should have popped to the surface if she had dropped her weight belt. Abi had let the class stay down way past their safety margin so the chick with the torn BCD was nearly out of gas and Gigi who was in the group had to unbuckle her weights for her and buddy her to the surface. Abi looks almost angelic with a lovely face and gorgeous figure [see the image accompanying this entry] even when it isn’t being shown off encased in tight rubber. But I’m beginning to wonder if she isn’t a sociopath because of the number of ‘accidents’ and the fact that she seems not to care. A typical comment is, “well, perhaps she (the victim) will listen when I tell her what to do and practice beforehand next time”. Adolph does expect her to deliver some injured TGs that he can ‘mentor’ for his own purposes and the way she conducts her training is a very efficient way of doing that by sorting out the girls who aren’t paying attention which makes them ideal for Adolph’s needs.

Cervical encasement: As a tightly focused advertising campaign (to escorts and rubber encasement fetish groups) Gepettos spin on cervical barriers as ‘Cervical Encasement Suits’ seemed a bit of a stretch to me, but there is enough truth to it to make it fascinating to men and women who are deeply into rubber encasement but wouldn’t have used a diaphragm or cervical cap for birth control. However, the campaign has been so successful in portraying cervical barriers as ‘encasing the most feminine part of a woman’s body’ that there has been a rush to get fitted for a diaphragm and a FemCap. It’s recommended a woman have both so her cervix can be safely encased even during her menses with a FemCap (fitted by a Gyn) as her primary cervical encasement device. So in addition to the surge in cervical barriers used for gas guards for dive-sex cervical barriers are now must-have parts of a rubber-chick’s encasement costume.

The publicity is a highly polished up-market version of the fetish interest in ‘vaginal rubber’ that I mentioned in my entry for January 25, 2010, ‘Upper repro tract protection for rubber-chicks’, and is keyed to the must-have mentality that so many of the young rubber-chicks and stallions have. The luster dimmed appreciably on $3.000 ‘must-have’ handbags and that sort of thing in 2008 when the economy went into free fall, but cervical barriers never lost their niche market for professional girls who offer dive-sex as a specialty and so had a real need for protection as well as rubber-chicks and their Doms in the fetish community who wanted the feel of thrusting into a stretchy rubber membrane and a certain amount of cervical thrust buffering. But it’s the ‘all-rubber-all-the-time’ aspect of cervical protection that has caught fire in the imaginations of the target audience and has driven sales for the last several months. As I mentioned cervical barriers, however popular are a niche market product so market saturation should be coming in the next few months unless Madison Avenue can come up with a new hook to increase the size of the market.

Multi-tasking: I’ve written before [see my entry for April 4, 2010] about breathing pure oxygen to accelerate purging nitrogen from my body so I can dive more frequently or for longer intervals. And that’s what I’ve been doing today while I do pointe maintenance; trimming off loose threads, checking ribbons and elastics to see of they need re-sewing and re-hardening the blocks of my traditionally made Freed Classics. While I’m doing pointe maintenance I often straddle one of my Sybian machines and put it on slow to masturbate, but today I inserted a pleasure plug (a Penetrator with a vibi egg against my g-spot) and am masturbating with the most delicious tiny orgasms. I love being able to multi-task that way.

Dry SCUBA: For penetrative sex – with a man - while on pure oxygen I set a single HP 130 beside the bed and wear a FFM while I’m being drilled. That way I get to hear the hiss of gas being sucked through the demand valve and smell the rubber of the mask while I watch the long thick shaft of a superbly equipped stallion moving in and out of me. Figuring my SAC at 2.0 cuft (which is high) x 5 minutes = 10 cuft divided into the tank capacity 130 cuft = 13x5 = 65 minutes of gas at 1 ATA if I was in orgasm the entire time. There is no man alive who can perform continuously for an hour or more so I have plenty of gas before I have to worry about sucking the tank dry. Because I’m breathing 100% oxygen there is a danger of fire but all consumer electronics are kept out of the room except the ones in waterproof (airtight) cases so no spark can set off a flash fire. This way I can continue my vaginal training with my duty stallion while I’m out-gassing. The only way dry SCUBA could be harmful is if the woman is tied to the bed or disabled in some other way so she can’t get the mask off if she runs out of air.

The 30 Meter Club

Twin Worthington HP 130 tanks used for 30 M Club encounters

Sex underwater: The idea of underwater sex, mostly SCUBA equipped dive-sex out here, seems to fascinate my readers. Perhaps that’s because it is such an exotic setting for a sexual encounter with the problems of pressure equalization and dehydration, nitrogen buildup and lubrication. For a less expensive underwater sexual encounter extended snorkels can be used in calm water or a pool, but limit a couple’s maneuverability to shallow dives or frequent returns to snorkel depth.

A variety of suits can be worn from a bikini to a drysuit, not that a woman can be successfully penetrated while submerged in a properly functioning drysuit, but she can be caressed to a clitoral orgasm with a vibi or with an experienced man’s fingers if her suit is deflated until her groin is squeezed which can be awesome if you are with the right guy!.

Adolph and the 30 Meter Club: Adolph has agreed to let our escort trainees qualify for the 30 M club in his 62 M deep training facility. Until now our trainees have been using my 20 M pool, the pit, to train, but none of them could qualify locally for the 100 ft / 30 Meter Club, until now. Anya and I became members with Chuck in the cove at my place on Virgin Gorda several Christmases ago. For dive-sex training we use single HP 130 cu ft tanks worn high in the bottle clamp of an escorts buoyancy compensator so that the woman can be penetrated from the rear w/o her tank getting in the way. For actual dive-sex at 30 M we use twin HP 130s on a wing BCD (I wear a SeaQuest Raider modified with a SeaQuest Diva LX bra and harness) so there is sufficient bottom time for the couple to savor the thrill and give the encounter the attention it deserves w/o having to rush. There is more about the calculation of bottom time below.

I’m often asked by dancer friends who aren’t divers how we determine the size tank to use and the bottom time for a dive including dive-sex. While training for entry into the 30 M Club we use approximate calculations that work well with a good safety margin and a woman won’t be inducted into the 30 M Club unless she is an experienced diver with good breath control, not that she isn’t going to suck a lot of gas (sometimes 3 or 4 times normal) during arousal and orgasm.

Typically an experienced diver escort’s surface air consumption (SAC) rate can vary between .5 and 1.1 cu ft and during orgasm it can rise to 2.5 cuft/min or more. For dive-sex training we assume an average of 2.25 cuft/min. If we assume a surface air consumption rate (SAC) for dive-sex of 2.25 cuft/min x 5 min = 11.25 cuft on the surface.

Bottom time: at 100 fsw (4 ATA) 11.25 cuft x 4 ATA = 45 cuft divided into the tank capacity 130 cuft = 2.8. To get bottom time in minutes: 2.8x5 = 14 minutes. But that is w/o any rock bottom time air for ascent and deco.

If we assume a reserve emergency / ascent gas of 1200 psi in a HP 130 for a dive to 100 ft (30 M) that is approx 30 cuft that must be subtracted from the total to calculate usable gas for bottom time. 130 cuft – 30 cu ft = 100 cuft. 45 cuft divided into 100 cuft of usable air = 2.2 x 5 = 11 minutes of usable bottom time at 100 ft with a 130 cu ft tank, which is why we induct members into the 30 M Club using twin HP 130s which should easily give a woman 20 to 25 minutes of bottom time at 100 feet for dive-sex unless she panics. Another reason for using twin HP 130s is that Adolph’s facility is 200 feet deep and if there is a buoyancy problem the additional air might keep the diver alive (if nitrogen narcosis didn’t get her) until s/he could deploy a lift bag and get to the surface. The specs on the Worthington X8-130 are:

*Volume: 130 cubic feet (16.0L)

* Service Pressure: 3,442 psi

* Outside Diameter: 8.0"

* Weight: 43.0 lbs (empty)
* Height: 25.5 inches* Width: 8.00 inches

* Buoyancy Empty: -2.0 lbs

* Buoyancy Full: -11.7 lbs

The tank buoyancy characteristics allow shedding a few pounds of lead from the weight system so after a dive with a twin-set there will be about -5 lbs. The 23 lbs when the twin-set is full can be easily handled by the SeaQuest Raider buoyancy compensator. Of course there is no offsetting buoyancy from a wetsuit because if any encasement suit is worn it’s latex with almost no buoyancy except for a tiny amount of trapped air.

Bottom time while training: In my pool (the pit) at 68 fsw (3 ATA) 11.25 cuft x 3 ATA = 33.75 cuft divided into the tank capacity 130 cuft = 3.8. To get bottom time in minutes: 3.8x5 = 19 minutes. But that is w/o any rock bottom time air for ascent and deco.

If we assume a need for emergency / ascent gas of 1200 psi in a HP 130 for a dive to 68 ft that is approx 30 cuft that must be subtracted from the total to calculate usable gas for bottom time. 130 cuft – 30 cu ft = 100 cuft. 33.75 cuft divided into 100 cuft of usable air = 2.9 x 5 = 14 minutes of usable bottom time at 68 ft with a 130 cu ft tank. The reserve air in this calculation is high and can be trimmed to give a diver another 5 or 6 minutes to extend the bottom time to 20 minutes in my pool w/o pushing the envelope.

Positions: In early DS training and at 3 ATA at the bottom of my 68 ft deep pit we use a single HP 130 so rear penetration can be accomplished which is the best position for taking well endowed men. But for admission into the 30 M Club where dual tanks are necessary woman astride is the preferred position as that is where a couples tanks are least likely to get in the way. I have worn my dual 130s so high that I can’t tip my head back to look up just to get the booted bottoms of the tanks out of Jacques way so he could take me from the rear but with the tanks that high it’s throws my center of buoyancy off – not a good thing - so woman astride is the most comfortable for a really intense encounter. And a woman who can ripple grip a man while astride 30 M down is really in the saddle for sure!

In Adolph’s well to maintain a constant depth and away from the walls we use ankle leashes to hold both the guy’s ankles at a fixed depth and inflate his buoyancy comp. to hold us there so the girl can sit astride and grip him with her vaginal muscles and legs. And, as I mentioned before the dual 130s are a safety factor for any possible buoyancy problem in the 200 ft deep facility.

Surface supplied diving and bottom time: Tank related bottom time problems can be eliminated if a diving facility has the ability to provide surface supplied air as my pit and Adolph’s well training facility do. Then a diver’s bottom time is determined by the gas s/he is using and nitrogen loading, determined by recent dive history. Both Adolph and I use Kirby Morgan helmets with the tri-valve exhaust which with Tri-mix can be used as deep as 330 FSW (100M) so the bottom of Adolph’s well at 210 ft is about mid way. Escorts are inducted into the 30 M Club wearing twin 130s so they know how to use that equipment since very few divers have access to surface supplied Kirby Morgan helmets.

The rest of the story: If you watch 30 M Club dive-sex videos on the internet you hear the theme: “Get down, get off, get up” because of the bottom time limitation of typical tank sizes since few recreational divers have access to dual 130s for a relatively leisurely boink at 30 M. No one talks about the woman’s pleasure or the problem of lubrication or the need to use a gas guard and there isn’t much about staying off the bottom while in open water so you don’t get mud or sand in the moving parts. The videos seemingly are made for guys and the woman’s contribution is to provide a hot tight vessel for the guy to shoot his wad in. I don’t think it’s an indication of guys hatred of women it’s just that so many of them don’t know enough to ask (and neither do the women) and are thinking only about their own pleasure.