This is an old thread, but an important one both genders need to talk about. Erections are involuntary, much like women can't "decide" to have erect nipples. When the conditions are right, it's going to happen. I would be mortified if I were a patient and got an erection during peri care. "Oh my God, what does she think I'm thinking?" Men get erections when men are providing peri care too. It's OK, just go about business. It's normal function. It's also a good sign of vascular health if you want to get clinical about it. The male body does that and that's all there is to it. As far as the dirty talk, that is a whole different animal - erection or not.