Some more from my collection:
Why did the baby go through the window?
He wouldn't freaking stop crying.
What's the difference between shoelaces and babies?
When my shoelace gets caught in machinery, I give a crap!
Why are dead babies better than live ones?
Dead ones don't make a fuss when you remove their liver.
What's warm, tasty and hallucinogenic?
Baby's adrenal glands.
How does baby let you know he wants them back?
He has a grand mal seizure and dies.