If you were my son

An old man was sitting on a bench at the mall, and a a teenager sat down next to him. He had spiked hair that was red, orange, yellow, green, blue & violet.

The Old man stared at the kid.
Whenever the Teen looked, the Old man was staring.

Finally, the Teenager said sarcastically: "what's the matter old boy, never done anything wild in your life?"

Without missing a beat the old man replied: "Got drunk once and has sex with a Peacock, just wondering if you were my son."