From About Last Night, by david Mamet
[Joan, a kindergarten teacher, is reading a Christmas story] Joan <http://www.imdb.com/Name?Perkins,%20Elizabeth>: And then an angel of the lord decended upon the virgin Mary... Kid: What's a virgin? Joan <http://www.imdb.com/Name?Perkins,%20Elizabeth>: A virgin is someone who has never had sex. Kid: What's sex? Joan <http://www.imdb.com/Name?Perkins,%20Elizabeth>: Uh sex, uh sex is how men and women make babies. Kid: Are you a virgin? Joan <http://www.imdb.com/Name?Perkins,%20Elizabeth>: No. Kid: So you have a baby? Joan <http://www.imdb.com/Name?Perkins,%20Elizabeth>: Uhm, no, men and women who don't want babies also have sex. Kid: What for? Joan <http://www.imdb.com/Name?Perkins,%20Elizabeth>: For about ten or fifteen minutes.