A "six lip smile" is what I call it when I bring a woman to climax and/or to come/cum. I named it that because all six of her "lips" are smiling at the same time: the two lips on her face, the two labia major lips, and the two labia minor lips.

2+2+2 = 6 - It's as simple as that.

BTW it is a great pickup line to ask her if she wants a "six lip smile" (most women get it right off the bat, most men can't count like that - so the lady knows that you know what your talking about, especially if you get called on to name the six lips, and you can). After/before you do a combination of a purr & a low growl in a ladies ear ask her if she wants to have some six lip smiles. Sometimes just the growling does it. Hehehehe!

When you eat dirt for the first time and leave your family to build a shack in the woods