Just like .....Time never stands still.
Fetishes cum & go as well.
So, I personally am Fetish friendly mainly from past being a Dominatrix. Which I don't offer anymore, but am still fetish friendly.
Years ago I had someone send me a video and asked if I would do this. The video was of a curved needle going threw the balls. (sorry tmi)
I never would of known that was a fetish until I saw that video. Then I simply replied back to the sub and told him no way would I do that.
Also years ago, while giving a FBSM, just before the ending.
He stops me and says he's a little embarrassed but he has a fetish and wanted to know if I would do for an extra "bill". I said, what is it? He said that he wanted me to kiss him after cim, not to swallow, but to give it too him. I said, sure.....that's not hard. Then I asked him what that was called........FYI, this was about 6 years ago and I've been a Provider for 7.......he said it is "Snowballing".
Anyways...the point it this......Nothing every stays the same. There is always going to be something different & new come up. So we can't name every item.