A man and his wife are in the shower together when the doorbell rings. The wife puts on a robe and goes down to answer the door.
A little boy walks into his parents' room to see his mom on top of his dad bouncing up and down. The mom sees her son and quickly dismounts, worried about what her son has seen.
A little boy was doing his math homework. He said to himself, "Two plus five, that son of a bitch is seven. Three plus six, that son of a bitch is nine."
Three sons left home, went out on their own and prospered. Getting back together, they discussed the gifts they were able to give their elderly Mother.