Getting cum samples is not easy: bitches are using trampling, strap-on and cock teasing to make test subject ejaculate
Cock measurement are not going well so nurse pulls down her panties to see if the guy still can get hard
Humiliated male slave is on all fours when slutty nurses are teasing his penis and probing ass in rubber gloves
Mad scientists ate checking out if cum can be pumped out of the balls with electric shocking device
