Jimmy Kimmel knows the real reason John Stamos is on 'Glee.' When the actor visited 'Jimmy Kimmel Live' (weeknights, 12:05AM ET on ABC), the host called Stamos a "diabolical genius" for it.

"As if you haven't already inserted yourself enough into the psyche of the women of America by hitting them with 'Full House,' now you're on 'Glee' to induct a whole new generation into your black magic," said Kimmel. "Now those teenagers who are watching 'Glee,' 10 years from now ... are gonna see you and go, 'Oh, I loved you on 'Glee.' They're not even gonna know what 'Full House' was. And they're going to disrobe."

Hey, Jimmy, to further cement your theory, you should add Stamos' sexy turn as Dr. Tony Gates on 'ER.'