Teacher asks a his class: What things mustn't you place in your mouth?
One Student raises his hand and feverishly shakes it.
Teacher: Yes Manoj....
Student ( Manoj): One must never put a lit bulb in one's mouth sir!!!
Teacher scratches his chin in confusion and asks "ummmmm I did not understand Manoj, can you ellaborate please for the class"?
Manoj: Last night I head my Daddy and Karan Uncle talking in the bedroom....Karan Uncle was telling Daddy to turn off the lamp and only then he will take "it" in his mouth