It’s no good telling teenagers that sleeping around will damn them to Hell when they don’t believe in God. It’s no good telling them the sleeping around will lead to infertility when having kids is decades away for them. It’s no good telling them the sleeping around will lead to a nasty discharge or pregnancy when their friendly neighbourhood sexual health clinic will non-judgmentally clean up the mess with antibiotics or the (mis-named) morning after pill.

What does make them change their behaviour is telling them that sleeping around will make their genitals look gross.