Men's erect penis size depend on method of arousal

The average American man's penis is 5.6 inches (14.2 centimeters) long when erect, a new survey of 1,661 men finds. The study, published online July 10 in the Journal of Sexual Medicine, is relatively consistent with the results of prior surveys of penis size.

In the new study, Debby Herbenick, a researcher at Indiana University, and her colleagues asked 1,661 men to measure their penis's length and girth for the purposes of fitting for a condom. (The men submitted their data online.)

At the time of their measurement, some men were with partners or "a friend," although most employed a DIY method for attaining an erection. Moreover, all erections are not created equal, the study also found.

Different methods of obtaining an erection may lead to different size measurements — men in the study who became aroused through oral sex reported larger penis size on average than those who attained erections through fantasizing, Herbenick said. "We don't know if that means that when men have oral sex that it's more arousing and they get a bigger erection, or means that men who have bigger penises could be getting more oral sex in the first place," Herbenick told LiveScience.

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Is your penis too big for her?

Advice for women who find the penis a mouthful to swallow

Next time you want to pleasure your man orally, start by swirling your tongue around his nerve-packed corona (the ridge where the head meets the shaft) and gently sucking the tip of his shaft. As his arousal grows, lick the length of his penis, alternating between sweeping up-and-down strokes and circular motions. You'll really make his toes curl if you caress his balls as you tantalize his manhood with your tongue. Or, lick his testicles as you manually massage his shaft.

When you're ready to take more of him into your mouth, try this titillating gag-proof technique: Form a tube with one hand and put it against your lips. Then, wrap your mouth around his shaft and slide your mouth and hand up and down in unison (make sure he's well-lubed with saliva or water-based lubrication). You'll send him into an orgasmic tailspin if you use your free hand to rub his frenulum (the thin ridge that runs the length of the underside of his penis) or supersensitive perineum (the area between his balls and anus) at the same time.

Read more: My boyfriend's penis is too big for my mouth. - Cosmopolitan

More oral sex tips to please your man

A little oral sex may go a long way

Scientists observes fellatio being practised by other animals too

Oral sex is surprisingly rare in the animal kingdom. Humans do it, of course. As do bonobos, our close relatives. But now researchers have observed the practice for the first time in a non-primate. During intercourse, female short-nosed fruit bats lick the genitals of their partner, a possible ploy to increase copulation time. The discovery suggests there may be a biological advantage to fellatio.

Of the 20 observed mating bat pairs, 70% of the females performed fellatio on the males, the team reports online this week in PLoS ONE. The males never withdrew while being licked, and the authors found that the longer a female licked, the longer copulation lasted (for each second of licking, the female bats gained 6 seconds of copulation). The team speculates that licking helps maintain the male's erection, and that the saliva increases lubrication, both of which may prolong intercourse. In all, fellating females mated for an average of 4 minutes, twice as long as the other females.

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