Bicycle
A Kid was walking to the bathroom, when he saw through the slightly open door, his mother was in there. She was buck naked and looking into the mirror while rubbing her breasts and moaning "I want a man. I NEED a man!".
The next day, the same thing happens: the kid is about to enter the bathroom and sees his mother rubbing her naked body in front of the mirror "I want a man. I NEED a man"
But the next day, when the kid is on the way to the bathroom, his passes his mother's bedroom, where some guy is humping her while she screams "I got a man, OH GOD, I got a man!!".
The kid immediately runs to the bathroom, stripping off his clothes on the way, then stands in front of the mirror rubbing his body saying "I want a bicycle. I NEED a bicycle!"....