Firstly, I want to say I'm going to give you serious answers I've culled from several different women. Also, keep in mind I'm a man.
What I've heard:
The size of a penis or "it"
is irrelevent 99% of the time. The sizes of penises vary from what is called micro-penis (less than 4 inches erect) to the freakishly abnormal hidden blessing of a John Holmes/Dirk Diggler 12''. Over 90% of penises are between 5''-7''. As anyone with a ruler will tell you, this is barely a noticable difference. Roughly 5% are less than 5'', and 5% are longer than 7''.
What most people forget to mention is that girth is usually more important than length. Since the average female's most sensitive nerve endings are located within the first 4'' of her vagina, a 5'' penis is plenty long enough. The key to pleasure is the circumference of the dong
. Those measurements are symetrical to the length, in most cases. The average girth is estimated to be roughly 4.5" around.
The problems with small penises: 1) When humping is taking place it's more likely to come out of the vagina. This ruins the flow of the sex and can be a turnoff. 2) While the vagina will contract to fit the size of the penis, a small one can cause minimal friction with the nerve endings, thus making sex little more than an aerobic workout. 3) Men who suffer from low-self worth due to the usual misconceptions about their supposed lack of cock, will try to overcompensate and move too fast, too hard, or just forget about the motion of the ocean, you dig?