There were two cows in a field. The first cow said "moo" and the second cow said "baaaa." The first cow asked the second cow, "why did you say baaaa?" The second cow said, "I'm learning a foreign language."
Two, one to screw it in, and another to say "Sock it to Me." (Notes: Sock it = Socket. Also, for the infant readers among you, this was a popular catch-phrase from "Laugh In.")