A Love Triangle
This is legitimately one of the greatest threesome scenes ever done. Casey and Dana wait for Tyler by a fire, glasses of wine in hand - and they waste no time seducing him. The positions in this scene are all amazing, and Tyler has never looked better (check out his butt at 14:30). Take your time with this scene, there are no dull moments.
Believe it or not, this scene is actually 40 minutes long.. check out the rest of it at SweetSinner.