While I normally don't mind offering a little straightforward advice when a question is sexual in nature, particularly when it comes to young men being bewildered by female anatomy, it helps when you have something to work with ...
*sigh*
YG, the "lips" have as much use as male nipples (literally
) if the fetus were to become male, those lips would have turned into a scrotum.
The clitoris, on the other hand, is a singularly unique organ (although technically the neural tissue that the clitoris is comprised of is the same neural tissue that runs through the male penis). But the fact remains, the clitoris is the only organ that its SOLE purpose is for pleasure (and I am not going to point out that the TOP of a clit isn't the ENTIRE clit, if he hasn't figured that one out his girlfriend is the one who needs lessons).