Finally, a Scientific Answer to Why Guys Love Round Butts

This explains a lot.
This article was written by Markham Heid and provided by our partners.
It's no secret that many men love a full tush—but why? It may be because women with curvy behinds made better nomadic child-bearers back in the day, according a new study from the University of Texas.

You’ve probably never thought about "lumbar curvature" or "vertebral wedging." But the study authors have. And their research shows men tend to go gaga over a woman with the type of spine curvature that makes her butt seem to pop out or protrude.

If you're like the average man, you're especially attracted to a woman with a spine that curves roughly 45 degrees above the top of her butt, the research shows. "This degree of curvature would have enabled ancestral women to shift their center of mass back over their hips during pregnancy," says study coauthor David M.G. Lewis, Ph.D.

Back in hunter-gatherer times, human beings were constantly on the move. Staying still was a death sentence. So women who could keep walking long distances even while very pregnant had an advantage in terms of reproduction and survival.

Lewis says a 45-degree lumbar curvature allows a woman to carry the weight of her unborn baby in a way that makes her less vulnerable to spinal injuries than women with more or less curvature. Thousands of years ago, this would have helped her to keep moving and foraging during the later stages of pregnancy—a huge plus, says Lewis.

Apparently, modern man hasn't lost his taste for curvaceous, baby-bearing derrieres—at least according to this research.

What Each Sex Position Feels Like for Guys

Take a wild guess at which one makes him scared for his penis.

It’s highly likely that you have a ranking of your favorite sex positions. Maybe girl on top makes you feel like the hottest cowgirl-goddess hybrid at the rodeo but doggy style just ends with your cervix feeling like one giant bruise. It’s the same for guys; here’s a glimpse inside a man’s mind when you’re getting it on.

Missionary
“It’s classic. I like starting this way the most, so it has the added benefit of being associated with the feeling of first entry. There's nothing like slipping into her warm wetness down there. It makes me think there's a reason humans evolved to have sex this way. Plus, if I get too close to coming early, I can just think about the name of the position, and it keeps me from going over the edge. Missionary: sexy position, unsexy name.” —Sam J.

 “Good old faithful. Though I think missionary is over-used, it serves several good purposes. It's the position where I feel most in control of what is going on, probably partially due to my familiarity with it since it’s over-used. When I have that control, I’m more capable of making myself orgasm, and I'm all for orgasms. It's also a good go-to position when you are working with inexperienced girls. They feel more comfortable when you’re on top doing the work. The drawback is that women sometimes feel like their role here is to just lie back and enjoy. As much as I love seeing a woman's face as she experiences pleasure, so much more can be done while you're on your back. Just because you're on your back doesn't mean you're out of the fight. You have hands, lips, a voice, etc.” —Adam K.

Things Some Men Are Too Afraid to Ask For in Bed

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Attention, Fellas! Use ALL Five Senses To Get In The Mood

 Attention men everywhere, psychologist Esther Perel has a message for you: "He who looks down there is wasting his time."


Confused? Allow her to explain. More women are stimulated by not just touch, but words. When it comes to hot sex games, if you want to engage your partner on every single level, you're going to need to capture all five of their senses.

When you do this, you're not only creating a stronger and more meaningful experience for both of you but building on your relationship in a way that lights your brain on fire (figuratively speaking).

Esther has an exercise for you: let your partner touch your hand and tell them exactly how it feels, tying your words and feelings together. Then, reverse it. Touch your partners hand and listen closely to what they tell you.

Are Your Birth Control Pills Hurting Your Sex Drive?

The experts say that oral contraceptives could be causing your libido malfunction — or not. We attempt to decode the mixed messages about birth control and sex.

1. Libido Loss

Scan the list of side effects that comes with your birth control pills — you know, the piece of paper that you toss in the trash every month. That little insert will tell you that oral contraceptives can cause everything from weight gain and breast tenderness to nausea, dizziness and...loss of libido? Come to think of it, you did start feeling a little different when you began taking these things. Could your birth control be preventing pregnancy in a way you hadn't planned?

According to some women who have experienced a drop in sex drive while on the pill, the answer is yes. Lisa*, a 33-year-old Web designer from New York City, blames oral contraceptives for a year-long libido malfunction she experienced after moving in with her now-husband. "When I realized I had no drive at all, I talked to my doctor, who said it was possible that it was the pill" causing the problem. "So I stopped taking it and used a barrier method, and things got really good again."