Only a parent will know what love is when at 2:30 in the morning your screaming child wants to go down stairs and play/eat/drink milk/go for a walk....

Or waking up in a warm puddle at 3am. Stripping the bed and showering; then trying to get back to sleep with wet hair.
Gotta do it though. If you don't have kids, you're breaking your longest standing family tradition.