slut rod
The form of birth control which is a small silicon rod inserted under the skin of the upper arm with an effectiveness rate of 99.9%. Rod yields the holder the power to act as a 'slut' without the consequences of conception.
Man: Are you on birth control?
Woman: Don't worry mate, I have a slut rod, do your worst!
Woman: Don't worry mate, I have a slut rod, do your worst!