Little Johnny and his mother

One day, Little Johnny was going up to his bedroom when he heard
moans coming from his mother's room. He opened the door a bit
and she was touching herself saying
"I need a man, I need a man!"
Johnny wondered what she was doing but went to bed.
The next day, he was going to his bedroom, and he heard moaning
again.
He opened the door a bit and saw a man on top of his mother
doing what they shouldn't be.
He hurried to his room, started touching himself and said,
"I need a bike, I need a bike!"