Why don't kleptomaniacs understand puns?

They always take things literally.

How many didn't?

Ten. (Shame this one doesn't work too well for reddit - the funniest part of this joke is the third punchline enjoying people struggle to understand what the hell you're talking about.)

Why didn't the approaching black hole concern the astronaut?

He didn't understand the gravity of the situation.

Kleptomaniac Jokes More Kleptomaniac Jokes

Why did the kleptomaniac spend so much time in Bed Bath and Beyond?

He was taking a sheet.

Why can't you tell a pun to a kleptomaniac?

They take things literally.