Sadly, your boyfirend sounds exactly like me. I mean that in a good way because I found it very hard to cum with another person until I was 22 and that was with the first time I was ever in a relationship with a girl where I could ahve sex on a regular basis.

Your boyfriend may be feeling uncomfortable about his body and that can hamper sexual performance. He could be nervous about cumming to quickly or he may even feel some guilt about the act of coitus.

My advice is to let him know what a sexy little cuddle bear he is. It may also help to find out what turns him on. What used to help me was when my girlfriend would keep the lights on so I could watch her facial expressions and ummm getting quite vulgar.

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Well sir that seems to be someone else's problem.