A young man excitedly tells his mother he's in love and that he is getting married.
He says, "Just for fun, Mom, I'm going to bring over three women and you try and guess which one I'm going to marry."
The mother agrees.
The next day, he brings three beautiful women into the house and sits them down on the couch and they talk for a bit.
Finally, the son asks, "Okay, Mom, guess which one I'm going to marry."
She immediately replies, "The one on the right."
"That's amazing, Mom. You're right. How did you know?
The mother replies, "I don't like her."