I have been in a half dozen or so sexual encounters and I can never acheive full erection, or even sustain a mediocre one. I am always very relaxed and I really want to have sex, but for some reason I can't.

When a girl is trying to suck me off, I literaly feel no sensation at all. I have tried anal intercourse and the same thing again: no sensation and crappy erection that disapeared quickly.

I had one sexual encounter with a guy and the same thing happened.

What's wrong with me >.<