In its classic sense, "classics", when used as a singular noun, means the study of the language, literature, history, art, and other aspects of ancient Greece and Rome. As a plural noun "classics" are books written in ancient Greece and Rome.
... mm) long and opens in the vulva between the clitoris and the vaginal opening.
In the human male, the urethra is about 8 inches (200 mm) long and opens at the end of ...