The Problem

I adore my boyfriend and I want to have sex with him... However there's a slight problem. His penis and his belly. My boyfriend roughly weighs 350 and pushes 6'2 in height. But he has a fat pad surrounding his penis.. Making it smaller and therefore I think sex with him will be difficult. I don't know what to do. He doesn't like blow jobs, and I think it has to do with the size and fat around it. I told him I don't care, but I'm curious how this can work.. His belly is big and hangs, and he's trying to lose weight.. Any tips? For myself I am 5'4 and 230, but I hold my weight very well with diet and exercise.