Help me plase

Elena

I don’t know if I’m being ignorant but I would like your help. I like this man a lot. We’ve been dating for a while and a few days ago we had sex. I feel really good with him but I was surprised to see that he wasn’t completely hard, to the point that it was difficult for ir to enter. He is a young male in his twenty’s. This has never happened to me, I understand that sometimes happens but I have never seen it happen halfway. Is it because he doesn’t like me? Or was he nervous? Or he may have a problem?