Took my dad shopping for some new shoes

He’s 86 and found it quite tiring so we stopped for a coffee and a sandwich. While sitting there some teenagers sat at the table next to us. One of them had a Mohican hairdo that was dyed all the colours of the rainbow and my dad wouldn’t stop staring at him. Eventually the boy got fed up of this and asked my dad sarcastically ‘what is your problem old man haven’t you ever done anything wild just for fun’ My dad, without missing a beat, replied ‘I got drunk once in my 20’s and had sex with a peacock. I was just wondering if you were my son’