Are you my son?

A guy with bright blue, green and orange color hair was standing at a bus stop.
Few moments later an elderly man stood near him and kept staring at him hard.
Annoyed by the stares the guy asked him, "Wotz up oldie! Never done something wild?"
To this the old man replied, "Yeah,I f*cked a peahen once and I'm wondering if you are my son."