A couple of things could be happening. Three years is a pretty long time to be with your old girlfriend. Is it possible that she is still on the back of your mind, when trying to have sex with the new girl? If so...maybe you have some "sub" conscious guilt. It's pretty difficult NOT to get hard during oral. On the other hand...it can sometimes be difficult to STAY hard during intercourse, especially if you have some of that hidden guilt.
The other possibility, is that the new girl just feels different from what you have gotten accustomed to. Was your old girlfriend nice and tight, while the new one is not so snug maybe? Or...did your old gf move in a certain way, that the new one doesn't?
I'd say to give it a little time. You might just have to get over the old one; and get more comfortable with the new one. |