They've been competing at the U.S. Olympic trials, each with at least one victory over the other, and they'll be doing the same on the big stage in London next month.
So it's only appropriate for swimmers Ryan Lochte and Michael Phelps to square off now where it really matters: in the hearts and groins of women around the world.
By which of these athletes would you prefer to have your breasts stroked? With whom would you rather skinny dip? Weigh in below with your take on a Lochte and Phelps and the individual you'd most want to swim a naked medley with ... if you know what we mean!
Ryan Lochte or Michael Phelps? With which of these swimmers would you rather skinny dip? View Poll »