Guiding younger hard dick into wife

Do you get the urge to jerk his cock (or even suck) as you are guiding it in?
I don't suck it. But I do stroke it, to get a feel for how hard he is and how thick. If he is uncircumcised, although it may seem counterintuitive, I pull his foreskin forward, to cover the head. When I place the head at her entrance, his foreskin almost functions as an applicator and eases the entry of the head into her.
 
I actually love having this done. I'm a late 30s pansexual guy and once in a threesome with a couple, the guy (who was dominant) took turns alternately spanking his wife and me before having his wife suck me until I was hard. Then he "mated" us in a variety of positions, guiding me into her each time. He actually kept his hand on my cock a lot to tease us my limiting how far we could penetrate. I really don't know what was hotter: him helping her move up and down on me while he spanked her and fingered her butt, or him guiding my cock and hips in doggy-style. We were very, very overstimulated and when I was allowed to "go wild" and fuck her until I came, I ended up having to manually get off on her belly. I was in my early 20s and they were in their early 30s.
 
My ex wife was well shared and mostly into younger guys. Every encounter was different but, if we ever ended up on the edge of the bed or couch with him eating her pussy, I would slide in behind her holding her, squeezing her big tits and watching over her shoulder. When she had enough licking, she would have him stand and I would guide his cock into her. I'd hold her tits for him to suck, rub her clit, squeeze her pussy around his cock as he fucked her. She also had really long lips, I enjoyed streching those wide for a better view and if she squirted, it made for a great show. We always made it clear to the guys up front that if they were afraid of another man touching their dick, they probably shouldn't come over.