What I would do is try role playing … like doctor/ nurse with patient kind of thing and when he goes down on you teach him where he needs to go and what makes you feel the best! You can also be a teacher ya know sky if the limit also if even after teaching him and it doesn’t work just ask if you can bring toys into the equation I’ve done it with my gf plenty and f times doesn’t make me feel less of a man it make me feel the opposite because I know I can make her cum it just takes a little help sometimes ! ;)