Ricky Martin dropped trou this week -- with photographic evidence.

And no, he wasn't caught with his pants down while engaging in any sort of salacious activity. He merely auctioned off his pants for charity. Because really, who wouldn't want Ricky Martin's pants.

The Latin dynamo shared the bottomless photo on Twitter, posting a bilingual caption: "We even ended up auctioning my pants WTF!!! LOL Terminamos subastando hasta mis pantalones jajaja @BCEFA."

So which charity will benefit from his bare legs? Broadway Cares/Equity Fights AIDS, a nonprofit that's spent the past two decades raising funds for AIDS-related causes.

Even at the age of 40, Martin hasn't lost the boyish good looks that sent both women and men of a certain persuasion into a tizzy when he burst onto the pop scene in 1999. In the photo, he wears just a crisp white shirt, his underthings, and a faux-shocked "gotcha" expression.

We'll cut him some slack for the grandpa-chic look -- those dark socks and shoes are all wrong -- since he de-pantsed for a good cause. And, for the most part, looked good while doing it.