Expecting Father Joke?

A soon-to-be father hears a loud noise in the bedroom.

As he gets to the door, he hears: "Don't! Couldn't! Won't!"

He rushes to his wife's side: "What's happening?"

"I don't know. Call the midwife." she says.

He calls the midwife, says: "She keeps yelling out random things, like "Shouldn't!" and "Doesn't!", what do we do?"

Midwife says:"That's perfectly normal. Those are just contractions."