"Then I asked him:"
"'And is it OK if I still play with your penis for my research, even if we haven't made love in a while? Even if I have to go right back to work afterward?'"
"He got even more excited and just stared at me, thinking about how amazingly controlling that would be of me. He knew the idea was turning him on greatly as his cock got harder, began to feel very tight, and he started to drip pre-cum!"
"Seeing how turned on he was, I prodded him to answer, teasing him:"
"'Well? Would you let me play with your cock for my research, even when you feel all horny and needy?'"
"He just nodded, being too excited to speak."