(Me (16) and my girlfriend (16) regularly have sex usually 3-4 times a week, I have never had a problem with getting hard before not once. So tonight we were in bed and we were about to have sex she got me hard and when I went to put it in I started getting soft, I was confused so she got me like 80% hard and when I went to put it in same thing she tried 1 more time and I couldn’t get passed like half hard. Now I know the main cause for this is performance anxiety but I’m simple not anxious about my performance at all mainly because she fine she’s before me most of the time and if she doesn’t I make her finish by eating her out. And it’s not because I wasn’t horny I was horny. So my question is what could this be/mean?