A Straight Dope Classic from Cecil's Storehouse of Human Knowledge
Why can't cats be impregnated by humans?
January 1, 1982
Dear Cecil:
I think my roommate is having sex with his cats. Could you explain the biological reasons why cats can't be impregnated by human beings?
Cecil replies:
For the same reason you can't park a Cadillac in a closet, you bozo.