"Oh!" she said.

"Arrghh!" he screamed and dropped the hand on the floor.

She bent over, picked it up and screwed it back on. "Oh for goodness' sake," she said.

"Huh?"

"It does that. I'm sorry, I suppose I should have told you." She put a knee up on the bed, leaned over him, and proceeded to kiss, lick and stroke him all over until he'd almost forgotten but still avoided that hand.