so I’m gonna kvetch all I want!

Grue rings for his nurse while in the hospital. "Mr. Grue, what's the problem?"

"I can't kvetch." Grue says.

A little confused, she asks, with more precision, "Does something hurt? Do you need pain relievers?"

"I can't kvetch about pain." Grue says again.

"Are you comfortable? Do you need any pillows or blankets?"

"I can't kvetch about how comfortable I am."

"Oh, is the food not to your liking? We can change your menu if you like."

"I can't kvetch about the food."

Fed up with this one answer, the nurse asks with frustration in her voice, "... Mr. Grue, what exactly IS the problem?"

And Grue says, "I CAN'T KVETCH!"