h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

Can anyone explain me where they come from???

The North East of Dimpleland just off the continent of Goosebump.

No, but I've got two; one well-defined one in my left cheek (facial, that is) and one considerably less well-defined in my right cheek.

It's O.K. But do you have a special muscle or what?????

Dimples are usually located on mobile tissue and are possibly caused by variations in the structure of the facial muscle known as zygomaticus major. Specifically, the presence of a double or bifid zygomaticus major muscle may explain the formation of cheek dimples. This bifid variation of the muscle originates as a single structure from the zygomatic bone. As it travels anteriorly, it then divides with a superior bundle that inserts in the typical position above the corner of the mouth. An inferior bundle inserts below the corner of the mouth.