People are only just learning what the tiny hole in nail clippers is actually

Kaplan further warned that the bacteria can be transferred to your system ‘by scratching, nail-biting, nose-picking and finger-sucking’ and can go on to cause an infection.

In addition to explaining why we should cut our nails, there’s a little known fact about clippers themselves that’s still leaving people scratching their heads to this day — that mystery being the small hole on clippers.

Many (myself included) have long ignored this design feature, presuming that it’s not really for anything, yet it turns out that the hole is there so that the clippers can be connected to things like keychains, toiletry kits, and so on.