I took my dad to the mall the other day to buy some new shoes (he is 92), and we decided to grab a bite at the food court.
 
I noticed he was watching a teenager sitting next to him who had spiked hair in all different colors: green, red, orange, and blue.

My dad kept staring at him.  The teenager would look and find him staring every time.

When the teenager had had enough, he sarcastically asked:  "What's the matter old man, never done anything wild in your life?"

Knowing my Dad, I quickly swallowed my food so that I would not choke on his response, knowing he would have a good one, and in his inimitable style he didn't bat an eye before responding:

"Got drunk once, and had sex with a peacock. I was just wondering if you were my son."