Pregnant Typewriter

Q: Did you know that my typewriter is pregnant?
A: No, it is? Yup, it skipped a period.

Artificial Insemination

Two cows are standing next to each other in a field. Daisy says to Dolly, "I was artificially inseminated this morning." "I don't believe you," said Dolly. "It's true, no bull!" exclaimed Daisy.

Guests for Dinner

There was a little boy who had a bad habit of sucking his thumb. His mother finally told him that if he didn't stop sucking his thumb, he'd get fat.
Two weeks later, his mother had her friends over for a game of bridge. The boy points to an obviously pregnant woman and says, "Ah, ha! I know what you've been doing!"