Sphincter Surfing 

When a man puts his hard cock in another persons anus and fucks it without going too far into the rectum so as to surf the anal sphincter.

Sphincter surfing works best when the penis is pulled out of the anus then put back in again repeatedly in fast succession.

Sphincter Surfing by Dontbeusinyourrealname November 29, 2010

sphincter surfing 

A guy that likes putting his cock in other peoples buttholes.

A woman that uses a strap-on in other peoples butts.

John was sphincter surfing with Debbie on the beach.

sphincter surfing by Vic of the North May 15, 2008