Surprised

I always made it a point to kiss my son on head before he went to sleep. One night, when he was 12, I entered his room to give him the usual kiss, but he was already asleep. He was fighting a cold so I had given him some Nyquil. He was out cold and was laying on his back. As I kissed him on his head I was overcome by an urge to see his penis. I carefully pushed his blanket back until I could clearly see the opening in his pajama bottoms. When I reached in the opening I was surprised that his penis was 4' long and semi-erect, and that he already had a band of pubic hair around its base. I put my hand around his penis and started to stroke it until it was completely hard. Afraid that he might wake up, I then replaced the blanket and left his room. I still kiss him every night, but I avoid doing it in his room.