Well, we don't actually discuss actual activities, but we're also pretty open with regards to sex and sex-related topics. My family is very open-minded and pretty much could care less- they don't know to what extent we enjoy the lifestyle, but they do know DH and I like a bit of kink to spice things up (only because it came up in conversation "yeah, I like anal," or "I could be into..." whatever it is we're talking about). Sex just isn't taboo in pretty much any way with my family.

However, my inlaws are another story. They say that they've only had sex once, and that was to have DH (and they're only half-joking....), and they're generally prudish and judgemental about damn near everything there is in the world. They're they types that are totaly ignorant on a subject, then hear Rush Limbaugh or Bill O'Rielly yammer about it, then consider themselves experts, with the sole job of converting the world to their beliefs. They are wonderful, loving people, but narrow-minded nonetheless. Needless to say, we pretty much never talk about sex with them (except when the MIL kept dropping by unannounced while we were having sex. About the bajillionth time it happened, we told her she had fuck-dar and needed to call first so we could finish. She was scandalized and embarassed, but at least she could still laugh about it. She calls first now, lol).

As for our friends, none of them really care (the topic has come up before, and everyone's pretty much open-minded and indifferent). The more liberal ones probably have an idea that we enjoy an "explorative" sex life, but we keep it quiet in front of our conservative friends. Generally (and this goes for everyone), if they ask about it, we don't mind talking. But if they are easily offended or don't want to know, we don't volunteer info. That, and we don't parade the lifestyle for anyone- we're not into public displays, so it stays behind closed doors for us. Wow, that was a rambling response to a simple question!
-Phan