1: What does a woman have two of that a cow has four of?
Legs
2: What does your dog do in the backyard that you can step into?
Dig a hole
3: What does a man have that's round and hard and sticks so far out of his pajamas you can hang a hat on it?
His head
4: I went out dressed like a chicken last night... and I met a girl who was dressed like an egg.
One thing led to another and the lifelong question was answered:
it was the chicken.