Son: Daddy, how are babies born?
Dad: Well you see son, when people get married they have a baby, and when the baby grows up he gets married and has his own baby.
Son: Are you sure, daddy?
Dad: Yes, I am.
Son: But mommy said people evolved from monkeys. You're lying, daddy.
Dad: I'm not lying. Your mom was just talking about her side of the family.
Ooh the burn... Sorry mom. Your husband is very mean. You ought to leave him, I say, telling your son these untruths.