Hi, I'm about 8x6" and have been unable to penetrate my boyfriend despite repeated attempts. (And I've never actually performed with anyone else before.) It just seems to be too thick to get in more than half an inch or so. Any advice? Is there anything we can do besides forcing him to use some sort of sex toy to work his way up to it? I guess what I mean is...is there anything that can be done without trying to give his ass a preparatory workout? Also, any advice for a first time top? Many thanks.