Laugh Out Loud (Old man)

A young man saw a 76-year-old man crying int he park, and asked,

"What's wrong?"
"I'm in love with a 20-year-old woman," said the old man answered.
"Well, nothing wrong with that."
"But, you don't understand. She has just moved in with me last night. And she is very loving."
"So, why are you crying?" asked a young man again.
"I forgot where i live," the senile old man answered.