What is Sphincter Thump?
1.
The Sphincter Thump is a more humane / less illegal derivative of the
Do you want all the benefits of a Donkey Punch without the trip to jail and rape investigation? Then try the smart man's way to muscle seizing pleasure, the Sphincter Thump.
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Where the man puts his penis in a girls armpit, whereupon she proceeds to lift her arm up and down, like she is playing the bagpipes. T..