Men build biceps to look good for themselves and other guys, says Men’s Health writer Lauren Russel. She claims that if a guy want to impress a woman, he has to focus on other muscles. Sweep that woman off her feet with a broad back and great shoulders. And score extra points with a nice butt and rock hard calves.

A Broad Back

A wide back is essential for a V-shaped torso, and women’s attraction to it is ancestral. “When it was important that our mates protect us from woolly mammoths on the plains, we looked for a gene pool that could provide us with protection,” says Ren. A broad back promises survival. “It’s a domination and protection thing,” says Kyra, 26. “Like he’s going to take care of you.”

Sculpted Shoulders

“The shoulder muscles are really the muscles of love and war,” says Nancy Etcoff, Ph.D., a psychologist and author of Survival of the Prettiest: The Science of Beauty. They also make the whole look when combined with a broad back. “Strong shoulders literally sweep women off their feet,” says Laura, 24. “That’s where we can wrap our arms around and snuggle up.”

Nice Butt

It’s something to hold on to. “During sex she can reach around, grab it, and literally pull you toward her,” says Timothy Perper, Ph.D., a biologist and author of Sex Signals: The Biology of Love. It’s a subconscious thing, he theorizes, but Jane, 36, says she’s fully conscious: “A great butt is one that looks like you can grab on and maneuver. That’s what it’s there for.”

Rock Hard Calves

“Women want an overall sense of strength and fitness,” says Etcoff. “If a man looks as if he can lift something but can’t run, it looks disproportionate.” Dawn, 25, says, “They don’t have to be enormous. But muscular calves are a very masculine trait — and that’s sexy.”

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