Son of a parrot
A skinhead type gets on the bus with an orange Mohawk cut all spiked out, green side burns, the whole bit.
Another more conventional and a generation older man can’t take his eyes of him.
Finally the skinhead says, “What’s the matter, old man? Can’t stand something different?”
The man replies kindly, “Oh no! It’s just that I screwed a parrot once and you may be my son.”