Last night my gf and I started to have sex, but we stopped after a few minutes (just stopped, I wasnt finished or anything..) Then we popped in a movie, and we started watching it and before you know it we were having sex again. It was going fine, taking a little longer than I expected, but when we moved around (I went back to being on top), I got a cramp, I got tired for some reason and my legs tightened up. We weren't using any sort of lubrication yesterday and she was getting a bit dry. So I kinda took a break while in her, and caught a couple minutes of the movie (I know, I'm stupid) when all of a sudden, while in her, I start going soft!!! My d*** went numb too! I couldn't even feel it! Of course, you know what happened, my gf got kinda pissed. This has never happened before, but I'm thinking the combination of me being cramped and tired, plus no lube and being dry inside, plus we stopped before..might have caused this? It took me a good 10-15 minutes to get it back up again! I was hella pissed, I've never had this happen to me before. Can anyone tell me what happened?