Is it common for co-workers to discuss their sex lives or is it even appropriate?

There’s 4 of us in a small office and we all get along pretty well. I like that I finally have co-workers that I don’t have to worry about my every move and people I can actually have good and funny conversation with. We all open up to eachother…

Anyway, I swear every day they like to talk about and bring up sex. They bring up their sex life, their partners, positions, toys, their ex’s privates, what’s sexy, porn, etc. as if it’s completely normal. I’m a very private person so I don’t really participate but I kind of try to without being too descriptive because I don’t want to be seen as a prude or whatever. It’s uncomfortable and disgusting, I don’t want to imagine my coworkers, especially unattractive, naked doing things in certain positions and preferences! lol They’re just sooo graphic. Maybe I am just a bit more conservative in that part.

Also, they objectify men. My gay coworker especially always eye “bangs” everyone that walks by and they all discuss how hot that person is. They think everyone is hot by the way.