The act of neglecting to brush one's teeth for 1 week, then during sex whacking your partner's genitals with a cricket bat most unsuspectingly. Often results in sterility, which can sometimes be the initiating factor.
"So last night I wanted to try something new with Karen, but she had thoughts of her own"
"Oh yeah? What happened?"
"She gave me a British Pound. I peed blood for like a week, and my doctor just told me I can't ever have kids"
"How much for an abortion?"
"One British Pound, madam."