This happened years ago, but I remember it like it was yesterday.
When I was about 12 or 13 I became involved in masterbation quite heavily. What kid doesn't? One afternoon after school I was in the bathroom standing in front of the mirror beating off, when my dad walked in. He told me to let him know when I was done, he wanted to talk. I instantly went soft and felt terrible and embarrassed. I got myself back together and reluctantly went down to talk to my dad. He was not mad at me or anything, he just wanted to tell me about men and masterbation. He told me that he himself, at 42 still masterbated.
After this talk, things were kind of strange around the house for a week or so. About a week later he came into my room and caught me again masterbating. Instead of leaving, he closed the door and told me to keep going. I could see that his penis was very big and hard under his pajamas. I have to say that I was very excited with him watching me play with myself, it was so weird. He came over to the bed where I was laying, and standing beside the bed, pushed his pants down to his knees. His cock was so big and so hard, it was shining.
He told me, 'Keep beating off son.' I was so excited. He started to pump his cock. It was so intense, watching my dad milking his big dick. I finally shot my stuff all over my hand. I sat up on the edge of the bed to watch my dad beat off. His pumping got faster until he told me, 'I've gotta cum.' The next thing I knew he said, 'I'm sorry son,' and shot a load and a half all over my face and hair. He held the back of my head and pumped the last bit of his cum out and wiped my face with his big penis.
He told me to clean up and then we talked again. He told me how sorry he was. I told dad that I thought it was nice to masterbate together. We never did again, and we never talked about that day again.