First time

It all started when I was 13 years old I was making a bus trip to one of the big city's and had a bit of time before my bus arrived, I was desperate to go to the toilet there was one at the bus station so of I went, I went into the stall sat down and done my business I was just going to leave when I spotted a hole in the wall not very big but big enough to see into the next stall, I wondered what it was for I was just going to unbolt the door when someone came in I thought I'd take a look it was an old gentleman around 70 years old he dropped his trousers and what I saw blew me away hid cock was massive, I watched for a while longer then to my surprise he started to pull his foreskin back slowly at first then he speeded up his cock just kept growing I thought I would copy what he was doing so I started stroking mine, his hand got faster has did mine then I heard a low grunt and he shoot a big load of spunk out of it I thought time for me and done the same, when he left he knocked on the door and said I hope you enjoyed what you saw and said that I had a nice young cock what a turn on