Here is another position that is effective for men with a smaller penis. These deep penetration positions are best when a woman is fully aroused.
Some women may find that the added sexual tension of being bundled tightly underneath the man can be quite sexual. You might find the struggle of having to take short breaths and the pressure on your breasts very stimulating. On the other hand you might find that you dislocate your anterior ass muscle and end up missing a few days of work.