No, but I did find out on accident back in high school that a friend has a foot fetish. Made things really awkward for a few days. I always thought he was just one of those people who likes to stare at the ground.
I'm not sure I'd want to know about someone else's fetishes, unless it was about a significant other.
You mean our fetish?
Nope. Although I do think there are alot of people that I personally know with many different fetishes but not the one celebrated here.
I was lucky: My exGF found out and indulged me (after some adjusting time). Eventually she always pointed out pregnant women to me when we were in public in order to make me horny. She knew exactly what would happen when we got back home of course ;-)
That whole ex part makes me hesitant to open up with someone sexually. People are largely unpredictable and love to talk. Keep in mind that I'm not embarrassed or self conscious about my sexuality. I just value privacy and discretion.