XXX - should be best joke in USA
Kylie Minogue, Robbin Williams & Elton John were walking over a bridge.
Kylie trips and gets her head jammed between the railings. With a couple of sideways glances Robbie pulls down her knickers and shags her senseless.
He stands back. "Your turn", he tells Elton.
But Elton starts crying.
"What's up?" asks Robbie.
Elton sobs, "My head won't fit between the railings!"