Sometimes, when the Asset is on a mission, he and his handlers have a lot of downtime where they're just waiting around for orders. Hydra needs to finish recon or put some players in place before the assassination happens. To pass the time of course, his handlers use the Asset for entertainment. They rape him repeatedly, and when they're done they always plug him up nicely, trapping all the come inside the Asset until the next time they want to fuck him. Over time, with the fucking and the plugging, the come builds up until the Asset is so stuffed with come that his stomach is swollen and grossly distended, he can't move without cramping, and he just wants to take the plug out but he can't or he'll be punished and oh look Rollins is ready for another go.

Basically, the longest, slowest come enema of all time.

+If the only food he gets in this time is also come, so his insides are literally full of spunk and nothing else

++his handlers put a catheter in, and the pressure in his stomach (both to void and to piss) is so painful it makes him cry