Real Dad Curious About My Son

I am a 35 year old gay man and I have a 15 year old adopted son. I've always been very transparent and open when raising my son. I'm a bit of a naturist by default so when we're at home we're usually nude (unless it's too cold). I just have never seen the point in making nudity or sex taboo subjects. They're normal parts of life just like breathing or eating. So I've incorporated that in the way I've raised him. This has made us very close and open with each other, and my son came out to me as bisexual last month. I'm the only person he's told so far.We were watching a movie at home this past Friday (both nude, since that's how we are at home), and he ended up getting a boner and I was teasing him about it, harmless jokes, just telling him that he better go take care of that. That kinda thing. And he ended up asking me if it would be weird if we jerked off together. This obviously caught me by surprise, but I admit that I was intrigued. We talked about it for about a half hour and then decided that there's really nothing wrong with just jerking off together because it's not like real sex. We ended up jerking off together, right next to each other, while watching porn. I know some people may not agree with this, but in a weird way it was kind of the best bonding experience between us.Obviously I'm kind of hesitant to post this and share this, but I'm wondering if anyone else has had a similar experience with their dad or son. And also would like to know your guys' opinions