Extracted from "The Perfumed Garden", a 600 year old, Arabic book on sex.
A man worthy of praise can easily get an erection, he is not quick to discharge and, once he has lost his sperm, his member is soon stiff again. His member is long enough to reach the end of his partner's vagina and large enough to fill it. A man whose penis is too small cannot please women.
Human sexuality is never that simple no matter what "that" is. Some women like really deep penetration (A- spot) but even then you can get the wrong angle and hit something more tender and hurt them. A lot of women don't orgasm through penetration period