I don't hang mistletoe at Christmas time
Capitalization.
One is made of plastic and poses a suffocation hazard to small children. The other one contains newspapers.
Stalagmice !
A d orbital
That it was the most violent book he'd ever read.
Eggnog-stic.
One's fun to hit with a sledge hammer, the other one's a water melon.
A dead baby.
They Duckerate cookies. ...lol...
Cross mouse cards !