Chess Knight Move

An old man was sitting on a bench in the mall when a young man with spiked hair came over and sat down beside him. The boy's hair was bright yellow and green with orange tips, and he had blue makeup around his eyes. The old man kept looking at him. The boy said, "What's the matter, old man, haven't you ever done anything wild in your life?"
The old man answered, "Well yes, actually, I have. I got drunk once and had sex with a parrot. I was just wondering if you were my son."