There are 2,400 new cases of scabies and crabs a year.

Scabies (the itch) isn’t actually a genital infection. But it’s often dealt with at GUM clinics because of the fact that it’s frequently acquired through being in bed with someone who has the condition.

It’s caused by a little mite, which is just about visible to the naked eye. If your skin comes into contact with the skin of somebody who has scabies, some of the mites may well nip across from the other person’s body to yours.