Eyeball licking is a new fad sweeping Japan and, guess what, there’s an outbreak of conjunctivitis! Go figure.

Alternatively called "oculolinctus" or "worming”, eyeball licking has been around since the mid-2000s. Some young people say they find the practice particularly erotic.

One young woman reports she got into the practice years ago because, like when she has her toes sucked, it makes her feel all tingly. The fact that she “got some weird offshoot of TB in my eye once” and ended up with corneal ulcers and a month’s hospitalisation hasn’t put her off.  She still asks new boyfriends to lick her eyeballs and none refuse. She did propose that maybe there is a market for tongue ‘rubbers’.

Specialists warn there are ridges on the tongue that can cause a corneal abrasion. Conjunctivitis or "pink eye" is just one of the conditions you can contract from eyeball licking.