You have been to so many therapists with your issues, your perversions. This one is different, and she tells you right away that you will not be treated the same way anymore. She is sure that you've been pampered and tip-toed around like a little bitch. Not anymore.
The nastiness of being such a pervert - someone who will get hard over just about everything - needs to be treated with a lot more pain and pushing. Your cock will have to be trained to respond differently. She will be using some trigger words on you, and with each cock twitch you'll be slapping your dick down. HARD.
Don't expect any sort of sweetness in this session. She's not dealing with your behavior. PERVERT. And expect a surprise at the end - she really wants to make sure you remember this