Thomas Netter is a swing in “Clue,” a fast-paced, witty murder mystery now playing at the Forrest Theatre through Jan. 25.

We’ll just come right out and say it: Flirty knock-knock jokes can be a whole lot of fun—but only if you choose them wisely.

Garry Marshall may have created one of the most successful sitcom spinoffs of the ’70s with Laverne & Shirley, but the reason ...