Speaking on Reddit, the man - who goes under the name 'Verifiedson', revealed that he was just 14-years-old when he began sleeping with his mother.
"When I was in my teens, I had a sexual relationship with my mother"
He explained: "When I was in my teens, I had a sexual relationship with my mother. I think that we would both characterize the experience as positive.
"It started when I was 14, my mom was 37 [and] My dad knew about it from the beginning and supported my mom's decision."
Naturally plenty of Reddit users had questions, which the man - who insists that his experience of incest was not "traumatic" - was happy to answer.
He explained that their relationship flourished after he was injured in an accident and unable to masturbate.
He said: "I was injured in an accident at 14 and incapacitated. I went from masturbating 2 times a day to zero."
"After 2 weeks, I was frustrated and took it out on my parents. My mom and dad knew what was up and talked about my mom 'helping' me masturbate. They approached me one afternoon and when my mom said, I know you are frustrated and why you are frustrated would you like some help masturbating.
"Blood was rushing in my ears and I said yes but I really didn't know if she meant what I thought she meant. I was excited and confused. She said that she would take care of me when I went to bed."
Apparently the masturbation progressed "to her giving me oral and eventually we had sex".
"There once was a passionate kiss that happened during but it was weird so we didn't kiss after that"
Verifiedson insisted that the relationship was purely sexual, with no romantic elements involved.
He explained: "There was no cuddling. There once was a passionate kiss that happened during but it was weird so we didn't kiss after that. Pretty vanilla sex."
Despite disbelief and disgust from some Reddit users, Verifiedson maintains that his father and he remained very close - and that he would not change his experience for the world.
He insisted: "I wouldn't trade my experience for anything. I really thought that I was the luckiest kid alive. My mom told me then and since that it was great for her too."
"I'm in a LTR and sex is great. I don't have any hang ups or anything. I'm not into MILFS or kids. Just women my own age."
Were you shocked by how candidly this man spoke about sex with his mother? Are you surprised his father was "unbothered" by their relationship? Let us know in the Comments Box below now.