Lamp

One day, Little Johnny's teacher asked the class "Children, who can answer this question, please raise your hand!"

"Mention things you can suck!"

"Ice cream, mam!" Little Jane answered.

"Good, Jane." the teacher said, "Anyone else?"

"It's a lollipop!" said Little Steven.

"Very good, now it's your turn Johnny!" the teacher said.

Little Johnny, sitting at back then answered, "I think it's lamp!"

The teacher and all of the students wondered about Little Johnny's answer. The teacher asked him, "Johnny, how do you think we can suck lamp?"

"Well, last night when I passed my parents' bedroom", Little Johnny said, "I heard my mom said, please turn off the lamp, honey, and let me suck it!"