Dunk the biscuit in the cuppa

A game played by swingers. Woman lays down, whilst several men line up and take turns blindfolded (of course) to 'Dunk the biscuit in the cuppa'. Also known as putting their testicles in the woman's mouth which is full of warm untainted, delicious, scrumptious semen.

Hey Mike, are you up for a bit of dunk the biscuit in the cuppa tonight?

Did you hear about Mandy last night, she got dunked several times!