Michael Phelps plays Dr. McSwimmy on 'Grey's Anatomy'?

Sunday night on Jimmy Kimmel's hilarious spoof pre-Emmy special, Michael Phelps admitted he relieves himself in the pool, like most Americans.

Well, no wonder the French don't like us. They probably think we believe that their word for "pool," "piscine," gives us permission.

Anyway, above is the spoof "Grey's Anatomy" promo Kimmel showed. Jimmy appears briefly as a love-struck patient.

First, Ben Affleck. Now, he's swooning over Michael Phelps?

What's really going on here?

Maybe this why Jimmy and Sarah Silverman really broke up ...

Joking, joking!