A sexual position akin to an eiffel tower. Much cooler than the foursome brand, its threesome variant features two ladies and a gentleman. The gentleman will lie down on his back with his member erect. One lady will then mount his genitals, while the other straddles his face. The two ladies should be facing one another and may make contact, if desired. The gentleman will perform intercourse and cunnilingus as applicable. If they choose, when approaching climax, the participants may exclaim "the London Bridge is falling down!" as they will no doubt be so fatigued when they finish, that they will collapse upon one another.
Frank took his two lady friends into the back and performed a London Bridge. What a lucky guy!