I have done done a few. Mostly of my friends and some requests. I'll usually edge myself to the brink and start recording myself masturbating over an iPad. Usually moaning and just talking shit because i'm so turned on till i cum.
I enjoy doing it, especially now in the age of easy phone cam vids. Goes without saying that it's NEVER without asking first.
I love doing them. Thicc curvy Matures/Milfs/Gilfs are my favorite. Well my butter face fetish is pretty strong too.
It's not something that I even knew was a thing until a couple of years ago. I used to post on Reddit and I got a lot of requests for pics or videos of tributes to their wives/gfs. A lot of guys get off to seeing their partners in sexual situations with other people and for those that don't do it in real life, i guess pics do it for them.