BokoNonism

Bokononism is the religion practiced by many of the characters of "Cat's Cradle," one of Kurt Vonnegut's best novels. It is based on living by the untruths that make one happy. Bokononistic sex is a union of two souls achieved by placing the soles of two people's feet together.

See also WamPeters, FoMa, and GranfaloonS.