I'm currently single, none of my friends know and I'd be afraid to reveal it just since many people have very prudish and misinformed opinions about hobbying.
I'd kinda like to be able to be more honest about it and not treat it like a big secret, but IMO it's not worth revealing to people when a good portion of them will probably just judge you over it.
That said, I have respect for people that can be more open about it, especially celebrities. One thing that comes to mind is how a bunch of comedians (like Jim Norton, Patrice O'Neal, Bob Kelly) have been super open about it, reminiscing on the Opie and Anthony radio show about their sex trips to Brazil and other experiences. Even on that show, they had to deal with one of the hosts being a big prude. And I remember one time Aries Spears was a guest, and when they asked him what he likes to do with his money, unprompted and dead serious he was just like "I like to pay for sex". I wish I had that confidence.