That's certainly part of my pleasure knowing a woman is attached to another man yet is willing and able to provide incredible hand action to another man..I find it very hot! The woman in a sense is in total control and only the man is vulnerable by being naked. I have experienced this but only with another man. At first he stayed clothed and I laid on his bed as i watched porn on his TV. His touch was fantastic and my body ached and shivered as he took control of my throbbing cock. Usually in these cases the clothed female or male are experts in those skills. That just makes it even hotter. The female has total control over his body and the man just has to lay there and suffer. I find it erotic to watch the mans cock stiffen and turn color. Hearing him moan as the female is pleased with herself being able to have this effect. If done right, shell take her sweet time as the man experience intense agonizing pleasure until he pops, shooting out ropes of semen. The reaction of the woman is priceless as they are proud of the power over what they possess with just the use of their hands. I always imagine they return home to their BF or husband and get fucked. They do it as a simple transaction for a stranger but at home they unleash that same expertise using, mouth, pussy and ass for their man at home.