Men around the nation weren’t the only ones celebrating Aubrey O’Day nude photos in this month’s Playboy.

The magazine threw a party in honor of its most recent cover girl last night, as Hugh Hefner, Paris Hilton and Karissa and Kristina Shannon (donning matching Barack Obama t-shirts) got down, dirty and awkward together.

Here’s a look:

Click on the following photos for more, larger images of Hef and his gals grinding with one another…

[Photos Credit: Splash News]

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