Coworkers, generally no. I generally feel like that's not the place for it -- and I have other shit to do in general.
Friends, I don't really mind but I am mindful of anything that would be considered personal/intimate of my partners. I'll speak of myself freely, depending on the friend and the context.
Generally a lot of my friends are pretty open and candid sexually, I'm surrounded by a lot of like-minded people who acknowledge how normal and important sex is. I can recall a lot of times talking about kinks or experiences with friends.