Female genitalia essentially encompasses the body parts between her legs. This includes the labia, clitoris, and vagina. The genitalia is where you go to give a women sexual pleasure by stimulating...
This highly dependent upon the females height and overall body structure. Race and national original also play a part, more from the males stand-point than the females, so caution should be used...
Because girls are not boys, or to put it scientifically, for the human reproductive system to work you need both male and female. If girls weren't girls the human race would die out.