Answer:
You do not "MAKE" a girl perform oral sex on you. If you have coated it in chocolate and whip cream with a cherry on top and stood in front of her after she hasn't eaten for 3 days, then she probably is just not into it, or you! Oral (and all other types of sex) start as a discussion while your clothes are still on. You need to talk with her about her and your lsexual likes and dislikes.