I am 22 and I have had a lot of sex in my life thus far. But in the last 1-2 years I haven't been able to stay hard during intercourse or even achieve an erection. My last long term relationship of 2 years, my girlfriend at that time always wanted sec even when I told her no and she pretty much forced it upon me and I think that may be part of the reason. But now until a year or so later is when the issues started. I have been tested and cleared or bacterial STD's and am in great shape. My doctor tells me I have good blood flow and that things look alright but when I go into intercourse its like I'm not truly turned on anymore or something.

With the last 3 girls I have been with its like I have a bad starter where my penis will get hard then lose erection 1-3 or 4 times and then I can go for 1-3 hours like I used to. Also, when I go down or those girls would get on top or there is a distraction, its like those are the main times I lose erection. Maybe a control issue or pinched nerves?

There is more but I figure this is enough for now.