I've only sucked cock a couple of times with the very first time being in late 2019, I was 59. It was during a one-on-one bondage scene with a male Dom that I had seen several times before this.
In those previous meetings, there was always a lot of sexual contact between us, along with a healthy dose of bondage, discipline and edging. But there was never any actual sucking or fucking. Prior to this meeting, I had expressed to him that I wanted to expand my previous limits. And that included me orally servicing him if that was something that he wanted. My one stipulation was that it had to be part of the bondage scene. I didn't want to roll around in bed and "make love" to him by sucking him off. But if I was bound and "forced" to suck him in order to demonstrate my submission as part of the scene, I would do it.
This occurred toward the very beginning of the bondage scene. I was stripped to just a jockstrap as I normally am. Thick leather cuffs were placed on my wrists and then hooked together behind my back. A blindfold was placed on me so I couldn't see anything and a leather collar was placed around my neck. The scene began as it typically did with a lot of crotch grabbing and stroking, ass slapping and nipple torture with clamps. Several times I was pulled into his chest by my collar and forced to vigorously suck his nipples.
Then I was ordered down to my knees before him. Once in position, he told me to stick out my tongue. I immediately felt warm flesh against my tongue. And I knew immediately that it wasn't his fingers or anything else. It was his cock. He didn't issue any other orders so I did what a good boy was expected to do, I began to lick his shaft. My tongue made it's way up and down the entire length, including the head.
The licking didn't last long, as I now took the tip of his head into my mouth. I began to suck and tighten my lips around him, while continuing to use my tongue at the same time. I took him deeper, and in short order, I could feel his cock getting thicker and enlarging while it was in my mouth. I heard heavy breathing coming from him -- and me. As I worked his cock in and out of my mouth, deeper and deeper, he was becoming fully erect. He began to thrust his cock into my mouth, controlling how deep he went with each stroke. So deep that I began to gag with some of his strokes. And his breathing let me know that he was really enjoying himself!
He soon stopped thrusting and helped me to my feet. He didn't cum in my mouth. This was just the beginning of our bondage scene and he wanted to save himself till later. Toward the end of that scene, he did end up straddling my chest (I was spread-eagle, face-up, with 5-point restraints to his bed) and cumming all over my chest.