Dave Yazva worked at a government laboratory for alien exploration and exploitation, most of these beings here were found in deep water caves that ended in a natural ecosystem cave that had hidden these alien tentacle lifeforms. They grew in bunches and got nutrients for growth in many ways, with their discovery it became apparent that they got many of their nutrients from animals that maybe fell into the cave or just wandered through. 
The team that went into the cave to remove the weird little monsters found these tentacles had a tendency to try and invade the open orifices of the men and women scientists that explored the cave and its inhabitants. The tentacles were able to invade the protective suits very easy and in the case of two of the scientists’ logs, this lifeform went into male and female, connecting with the nervous system within minutes, the female scientist had both her lower orifices invaded and then was frozen in place. She got a wide-eyed look on her face and instantly looked down, the lifeform sent waves of pleasure through her in seconds and then sent her over the edge having her orgasm over and over. For the next 15 minutes it didn't let her move, but it also didn't hurt her in any way other than drinking her juices as she dripped and ejaculated multiple times. Although she'd never be the same again, as "it" had changed her in ways they'd never know, making her crave this invasion of herself as the only way she'd ever have sex or cum again.
 The male scientist had a similar experience, only that the tentacles attacking him didn't keep him there as long. This tentacle lifeform had two different styles of shapes on its "limbs", one had a wide, flat mouth like beak and the other was softer spike or "phallic" in nature. These two limbs worked in coordination with one in his anal passage tickling his prostate and the other looked like it gave him fellatio, and made the scientist orgasm 5 times before it quit. 
Apparently, it got nothing after that and was pleased with its "dinner". Although Dave was also changed like his colleague, after this experience with the lifeform, he was put back into his Male Purity and Safety Device, only having gotten it taken off by his government laboratory for the exploratory expedition. His suit had a suitable shield within lower brief that stopped any form of stimulation required to stimulate him to orgasm. Dave Yazva was severely reprimanded for this tentacle sex and his ejaculations by it. He was taken to the government laboratory doctor and after they checked him out with a clean bill of health, he was welded into his current permanent Male Purity Device. This unit was computer controlled by cellular and satellite services, anything more than the natural dripping of excess seminal fluid and the device would notify the laboratory doctor and more surgical remedies could be employed by the Congressional Purity Board that over saw all the Chastity Laws. 
After two years of anguish in the permanent cage, Dave Yazva went back into the special room with the aliens, it was his only hope for getting some relief from this horrible device he never agreed to. He was going to get unlocked if he pushed the button on the wall, that's what everyone said, so in the middle of shift change he managed to slip in without any stopping him. He was throbbing at the memory of what happened in the last encounter with the alien. He wore his easiest accessible bodysuit in hopes the monster could break off the cage and fill him with orgasm after orgasm, but his cage was a special one, the monitor sensed his entrance and shut down the unlock protocol. His chastity was the only one that would enact the measure, but now he had trapped himself in with the tentacles, even if it couldn't get to his penis, it could milk him and get its nutrients on way or the other.


by D.Karch