[I asked Dr. Pavlova if she was worried that Tom would masturbate on such occasions.]
"No, Dick, remember how I made him masturbate using his hands and pretending that they were 'my' hands? And that 'my' hands would always get him very excited but never let him cum? Well, this had been going on for so many years by now that masturbating would only get him more excited and frustrated. Try as he might, he would always tell 'my' hands when to slow down or tease himself more lightly at the last second, which would prevent him from cumming. So he could never cum that way. Besides, I had also gotten him so addicted to intercourse that masturbation just wasn't satisfying enough for him."
"In any case, I would check in on him every so often, just to keep him on his toes and to make sure that he and Nicole weren't making love!"