I have always wanted a dimple, and spent a lot of time during my years in school trying to acquire one with the help of a pencil thrust into my cheek and rotated; I didn't know that I didn't have the right facial musculature! No dimple resulted from all those persistent attempts....
I gave up the attempt and told myself, in true sour-grapes fashion, "A dimple is an inside-out pimple!" ... and restricted myself to looking, with admiration, at those who did have dimples. Both cheeks (er, the facial ones) or one...to me it really does add a great deal to facial beauty.
Dimples, in fact, are considered so much a beauty asset that many girls, particularly in north India, are called by this name. Who can forget Dimple Kapadia's debut as and in "Bobby" , which had a generation of men drooling over her? (She also had a sister called Simple, but that's another story. Would anyone fancying the sister be Simple-minded?)
Funnily enough, though, a dimple in the chin (or call it a cleft chin, if you like), which is considered an epitome of manly beauty, has never attracted me at all. However, I have no opinion about dimples on nether cheeks ...but of course, dimples on the knuckles, elbows or feet of babies are always beautiful to see!
Dimples are also, apparently, very good for aerodynamics; this entry answers the famous question, "how many dimples on a golf ball?"
Trust science to take all the fun out of dimples by calling them "disambiguation"! :)
That was a smiley, but alas, without a dimple in it....!