Rocky Mountain Oyster Stout.
Know what Rocky Mountain oysters are? Well, let's put it this way -- if you have the balls to drink this, you should know what it is. (Actually, they taste pretty good deep-fried. But used to brew beer? Ew.)
And the beer's going to be sold in pairs. 'Cause that's how they come naturally.
more here, if your gag reflex isn't fully activated yet.