The key to open honest communication with someone is that both people have to grow a thick enough skin to not get wounded when they hear something they don't like hearing. Assuming for a moment that what she is doing is using unpleasant cmments to divert the communication going where she isn't comfortable (a common technque for both sxes, BTW), then you have to be strong enough to not let her get to you. You have to stay completely calm and open. If she says something like that, then you reply with something like "dear, if you are trying to divert the conversation because it is uncomfortable, I understand but would prefer you just say that you aren't ready to talk about that yet. If there is truly something different you would like me to do during sex that would increase your pleasure, then lets talk about it outside the bedroom. I care about you and want you to enjoy sex with me as much as I do with you, so it is a positive bonding experience for both of us, not something that drives us apart, or is used as a weapon." You know your dick is in the top 5% in the world. It doesn't mean you are a great lover--I have no way of knowing whether you are or aren't, but you definately have a big dick. You can let any comments to the contrary about your size roll off your back, because you know better. Doesn't mean you are a good person, great lover, more or less deserving of anything or anything else--just means it is a fact you have a big dick. Whatever you do, don't close the doors to communication, or let her close the doors. Be respectful of her limits and abilities, and work with her until you both reach a level of communication you are both comfortable with. If you can;t communicate, you don't have a relationship. You may have a friendship, you may have a sex life, but you don't have a relationship. That is about all I can offer on the subject. I wish you the best of luck in working it out.