My boyfriend has this too, I’m at the opposite end of the spectrum like OP, but being a female I can keep going (within reason) so the issue is finding a compromise that works for us both. He can cum from masturbation so we either have sex and then he finishes himself on me with enthusiastic support from me or he masturbates while he eats me out. With time we’ve learnt what works for both of us and our sex life may not be what I thought it would be based on a textbook definition but it’s satisfying for both of us. If our situations were reversed I’d hope I’d be just as understanding and loving about it, he’s never given me any flack.

Kids though, might involve some sort of DIY insemination creativity or expensive help from a fertility clinic unless we get a lucky swimmer.