05/11/2010 05:12 am ET | Updated May 25, 2011

Kellan Lutz, Mechad Brooks & More In Racy Calvin Klein Underwear Ad (VIDEO)

We were all beyond happy when the new CK underwear ads featuring Twilight's Kellan Lutz and True Blood's Mechad Brooks started popping up on billboards all over Los Angeles. But we were always wondering, what's with that "X" over their incredibly hot bods?

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