Male underwear has suddenly gotten very sexy. 

A decade after Marky Mark, later known simply at Mark Wahlberg, bared his six pack for Calvin Klein, more and more male celebrities are going shirtless for underwear ads. 

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The latest is Mario Lopez, whose muscled body is the new face of Rated M, a collection of men's underwear. The TV host and "Dancing with the Stars" hottie says of his line: 

"We want to be fun, we want to be funny, a little sexy," he says. "We want women to appreciate it, too."

Lopez has plenty of company. He joins Soccer star David Beckham, Tennis great Rafael Nadal and boxer Victor Ortiz, who have taken it all (almost) off for Emporio Armani.

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