Kellan Lutz, Mehcad Brooks, Fernando Verdasco and Hidetoshi Nakata ... in their Calvin Kleins

Now, this was a fun email to open this morning.

New images were sent to us for Calvin Klein's X Underwear: Elements collection and man, do these men know how to fill out their Calvin's. We salute you CK for putting the hump in hump day.

Models Kellan Lutz, Fernando Verdasco, Mehcad Brooks and Hidetoshi Nakata each represent a different element: fire, water, earth, and air, but we think all four of the men are bringing the heat in these steamy pics.

Being the givers that they are, CK is offering regular folk from all over the world the chance to show off their goods straight from their living room through their X Marks The World campaign. All you need is a webcam, your Calvin Klein X underwear, and preferably a hot bod.  Check out the video below to hear how men all around the world mark their spot... or to just stare their six-pack abs. Whichever works for you.

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Photo credit: Calvin Klein