Here's my contribution, albeit a rather tame one in comparison to those above.
drive.google.com
It's from a video I shot of my young buddy and my wife making their second baby. After countless re-viewings of it I still find it the most erotic of all of the scores of videos I've made of them making love. As always, it was harrowing to watch and hear my wife orgasming so hard under my buddy, especially when he finally ejaculated in her. But it was true love-making at its most glorious.
My wife was in her fertile time and I had guided my buddy's huge upcurving steely-hard cock into her. The ensuing fuck was extraordinarily beautiful and lasted more than half an hour. I got off on it massively.
I find this clip all the hotter by reason of it being so brief and beautifully understated. It's an example of Less being More for me when it comes to wife-watching inasmuch as it leaves me to imagine, amongst other intensely arousing things, the familiarly delicious cock-milking contractions of my wife's grossly stretched vagina in response to the beautifully measured but relentless fateful thrustings of my buddy's babymaking erection.
Vis-a-vis the lovers, the concealed deeper thrusting of the cock in the woman's love-sheath is rightly an extremely private physical aspect of lovemaking that is forever hidden from our eyes, and for me all the more wankworthy because of it being so.
Of course I did capture the faces of the lovers in some long sequences of them kissing and orgasming but they're too identificatory to share here.