Dr. Tammy Nelson, Ph.D., psychotherapist/sex therapist: Having a smaller penis doesn’t mean you can’t satisfy a lover. During sex, the walls of a woman’s vagina close just a third of the way into the vaginal canal; that means it’s the girth or movement—not the depth of penetration—that matters.

But stimulating the clitoris and the G-spot (1 to 2" in, on the vagina’s front side) is what will give her a mind-blowing orgasm. Be aware: It can take 17 minutes or more (not four, as some men think!) of clitoral stimulation for a woman to come.

Master that and you can be a great lover despite the size of your man parts.

You may not be as small as you think. In a recent British study of more than 15,000 men, average penis size was 5.16"—and more than half of the men were within just an inch of each other.

Dr. Michael Aaron, Ph. D., psychotherapist/sex counselor: But assuming you are actually smaller, there are still many ways to satisfy a woman. In terms of positions, try doggy style for deeper penetration. And bone up (so to speak) on your oral skills for clitoral stimulation.

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