Antidepressants & cumming

Molly☺️
My boyfriend has been on antidepressants ever since we've been having sex, we were each others firsts, but he has only ever cum without sex once and that was through a very very very long bj, I've read that antidepressants can cause problems with ejaculation and other penis related problems but I was wondering how common this actually is? Or am I just not that great at stimulating my man without sex??