First Really Big One

So I've been happily married to my wife for a couple decades and have had a few chances with other women, took some liberties but never fucked another or really cheated.
That being the case, there's been times over the years when either the wife wasn't in the mood for too long or I just needed something different.
So sometimes I'd go to the big adult movies place in the next town from where we lived.
Mostly always men there to either suck or be sucked off and sometimes to fuck some gay ass.
Very rare but sometimes a slutty woman or even a slut wife and subby hubby.
One very hot night I got a nice BJ from a sissy guy while his beautiful but cruel wife called him disgusting names but that's another story.
This particular time I was in a private booth with the door ajar and watching some slut sucking off a black cock while another one fucked her from behind. The film was really hot and I had my jeans unzipped and my dick out and in my hand stroking.
A guy sort of slipped in the door and asked if I minded if he watched with me. I said sure that's fine.
When this very ordinary looking older guy opened his pants and took out his dick I think my mouth dropped and I couldn't believe it.
This guys dick was like something from a porno movie. To this day I have never seen such a big dick. He was white, about 40ish, totally Mr. Ordinary, but he had a dick that was about 10 inches and wasn't fully hard, also about 3 inches thick.
He started to rub it and it didn't get much bigger but it did get harder and there was some clear fluid on the head of the cut cock.
After a moment he asked me to put my hand on it and stroke it for him as he took my very ordinary and average 6 inches cut cock in his hand.
He must've been a bigger guy than I thought because my dick got lost in his big hand.
His huge cock didn't get lost in mine though!
After just a few more minutes he asked if I ever sucked cock.
I told him I was straight and I liked girls.
He said he was straight too but a lot of times his wife wasn't in the mood or wasn't up to satisfying his big fucking dick.
He had his arm around my shoulders and applied gentle pressure to get me on my knees.
That big dick was all shiny and wet and next thing I knew I was kissing the tip, licking up the sweet and salty precum juice and wanting to make him feel real good.
His huge dick was way to big for me to take more than the head and a couple inches maybe.
He was probably fucking with me but he said I was giving him the best blowjob he ever had.
It was my first since I was about 13 and me and a friend used to trade BJs.
I can't imagine it was a good blowjob but he seemed sincere and very soon he said he was gonna cum.
I was afraid that I'd puke if he cummed in my mouth so I took it out and stroked him off the last little bit and he shot about 4 long blasts of cum on the booth wall.
He offered to suck my dick but I was so ashamed of what I done that I practically ran out of there.
Saw that same guy a few more times over the next year and he was working on me to try to take his dick up my ass but I was too afraid to find out that I was a gay fag and liked being fucked so I never tried. Sometimes I still wonder what that big long sausage dick would feel like digging up into my asshole.