In this sex move you will require a tin of Skoal (any flavor will do). Begin by packing a delightfully fat chew in your bottom lip. Proceed to have sex with your girlfriend, significant other, hooker, etc. Remove your penis for just a moment while you dip-spit on it. Now switch the insertion point from vaginal to oral. This will result in quite a surprise for the receiver.
While performing coitus with a female partner, bent over an open window. The assistant waits patiently in a closet, waiting to perform the 'switcharoo'. At this point the male coitus switches with his assistance who takes over performing coitus. The original male then appears outside the window in front of the female, he then waves and hops away like a kangaroo.
Guy 1 (man): "We sure scared the fuck outta her lastnight"
Guy 2 (assistant): "Yeah aye, she didn't suspect an old Outback Switcharoo"