I'm not convinced PD will have issues in terms of getting it up. He may be desensitized when it comes to porn but I suspect as soon as a girl brushes past his pee pee he'll crack himself in the forehead. I don't know for sure though.
A problem you may have PD is the problem I have from too much a-spankin'. I find it next to impossible to orgasm from normal sex, due to many years of my vice-like grip and prolonged fap sessions.
This has its upsides, but of course raises other problems when your partner thinks you aren't going off because they aren't "up to the task". The solution on my part is to ease up the grip and slow down the pace when fapping, but frankly I usually can't be bothered and carry on as usual.