I think of it as variety.
I often describe in my blog how I love his hot flesh above and below me and cool stainless steel to the sides of my cock as I fuck with a speculum in place. I certainly don't do it with every man, but I love the different sensations it creates for a variation in a long fuck session.
Bad Seed Media had their own site, but it may be gone. Search with Ryan's name. I know it's out there. Last night a guy at the bathhouse told me he'd just watched me in it. The title, I think is Cumming to Chicago.
I have been to two. I had a great time at the one at IML this year. Even better was the four day wellness retreat at a campground in Georgia. The porn guys are eager to play with any and all.
Seeing a man in a chastity device tells me he is serious about having his hole worked. That he gets his pleasure from anal orgasms.
I have had men who wear them so they can't touch themselves and cum too fast.
I have had men, as mentioned above, who want you to leave their dick alone.
Since I am mostly all about the ass--I love to be clued in instantly to what the guy wants from me.