Clitoris

The clitoris is a female sexual organ, located anterior to the vagina. A tiny part of it is external, appearing at the top of the vulva, the entrance to the vagina, just above the opening of the uethra . However, most of the structure is internal. It's, roughly, the analog of the male penis. It's, by far, the most sensitive part of the female anatomy when it comes to sexual pleasure.
Clitoris at Wikipedia
Category:Anatomy