Fun:Abstinence balls
From RationalWiki
Abstinence balls are small, spherical stress relief toys designed to be squeezed whenever one feels carnal lust. They usually come in pairs, much like Baoding balls (but not ben-wa balls!), are most commonly found in blue (the internationally-recognized colour of chastity).
Perhaps it should be noted that in a recent survey of 100 teenage girls who purchased the balls, 97 said they bought them for "practice" for their boyfriends.
