A Professon Lectures On The Evils Of Marijuana
Off he went one day into his inventory of horrors: "Used regularly, pot can cause psychic disorientation, sterility, cancer and castration!"
"Now wait a minute, Professor," interrupted a student. "Castration? That's absurd!"
"No young man, it's sadly true," replied the Teacher smugly.
"Just suppose your girlfriend gets the munchies!"