I know some girls who like average or small because they feel the friction is too much and length hurts. My last girlfriend could swallow a leg with her vagina, though, if I may paint mental pictures in your heads. I never had analsex as a receiver, but I would probably prefer an average if I where to receive - might change with time, though. As a sucker I love huge ones, though I only met one of them. Generally I think guys are more into size than girls, though many girls like and get turned on by large ones. I think sexwise, the mental side is more important for girls. If a large penis tickles her mind, then it will provide more pleasure than a small one. But as long as the girl surrenders to the act no penis hand or mouth will be the wrong one. So chemistry and feeling secure about the whole deal is what floats the sexboat.