I can be very open about anything as long as everyone around me is comfortable with it. I think when it comes to sex, nothing should be considered "normal" or "regular". I think the one aspect about sex that should always be considered is the different comfort zones that could be surrounding you.
I'm willing to talk candidly about sex, assuming none of my family members are around. And yeah, I'll talk about it in front of other people. Being candid doesn't mean I'm being raunchy.