I think if it is a very large cock, and the woman is tight enough to have trouble taking it, it helps to have a head which is smaller, so the initial penetration is easier.
:wink:
This is true for gay guys too. I am thicker at the base, so I can ease in and then once things start to heat up, let loose a little bit. I think for gay guys, thickness seems to be more important than length in intercourse. But in the locker room, straight and gay guys notice both.