Pun of the Day When should you lick an incandescent bulb? When the filament’s made of tongue-sten. 04/14/2026 · The Pun Gents When should you lick an incandescent bulb? When the filament’s made of tongue-sten. Tagged: chemistry, consumer goods HilariousPretty GoodOKPretty BadTerrible (1 votes, average: 3.00 out of 5)