Anyone catch their parents when they were young?

I recall once I opened my parents bedroom door and saw them both on the bed naked in a 69 postilion my dad kneeling on top his face buried in her pussy almost lifting her off the bed. She was on her back ass off the bed one hand wrapped around his cock and sucking his cock. She must have started to cum because she kept saying his name. Her eyes were closed and one of the times she stopped sucking to say his name he started to cum. The cum hit her face and her reaction was to take his cock back into her mouth. As she did so, she looked over and saw me standing there. All I could hear was them both breathing and moaning loudly along with the sound of her swallowing.

I was there for just a few moments. I tried to sneak out of the room but, later, my dad asked me what I wanted and told me I had to knock before entering. I also started to heard them lock their door which I don't ever recall hearing before.

I can't even guess how many times I jerked off thinking about my mom sucking cock and swallowing cum, seeing her tits, her ass.