Well who ever said swinging is not common?
There is an abundance of books, toys and games, DVD’s for people with desires of swinging.
Books about swingers and swinging.
Swinging: The Games Your Neighbours Play.
Swingers - True Confessions from Today's Swinging Scene.
Swinging for Beginners: An Introduction to the Lifestyle.
21st Century Swinging: A Guide for the Tempted.
Games for couples
The Lover's Guide - Fun in Bed Game.
Monogamy: A Hot Affair With Your Partner.
Fetish: The Game for Daring Couples.
Lust: A Passionate Game for Couples