Well, now that you're all here because of the keyword "sex" (half-joking…), I'd like to open a serious dialogue about the topic.
First, I believe that we live in a society where sex is rarely spoken about, and is treated as though it's something to hide. If a person speaks about it too frankly, or too often, they are classified as either a pervert or a slut, and sometimes both. That being said, I still talk about it openly, honestly, and relatively often (labels/stereotypes be damned!).
The response I get when I discuss it is usually something sexist. "Typical," most people say, "a guy wanting to talk about sex." HELLO!? Women have sexual needs too, and some of them are not afraid to discuss it openly and honestly, if they trust you. There's some mystifying sexist belief that men talk about sex, because they're the perverted gender. I've had far more discussions about sex with females, and not just because I had a sexual interest in the person I was conversing with (because I know everyone was thinking that was the reason).
As a male in his twenties, I become pigeon-holed the moment I bring up sex oftentimes. As soon as I mention the subject I get the above-mentioned 'typical' response. It's frustrating for a number of reasons. First, I legitimately enjoy discussing sex. It's a fascinating subject, and explains a lot about the person you're talking with. Second, despite the conventionally-held belief, as a male, I don't want to sleep with every girl I try to chat up. Third, sex SHOULD be discussed in great detail, it's one of the most important parts of life (if not the most important, depending if you talk to heavy supporters of evolution and general supporters of humanity's on-going existence :P).
To be honest, I've been incredibly surprised by a lot of my conversations regarding sex. Some people have zero (or almost zero) experience with sex, well into their twenties. Despite the obvious assumption, some of these individuals are not overly-religious, and are actually attractive. On the flip-side, some of my friends have a vast amount of sexual experience (yes, even some of the ladies too, who aren't "sluts.")
It's always interesting to have perspective into the sex-life of friends. Humans are naturally social creatures, and therefore love discussing things we can relate to. EVERYBODY can relate to sexuality, even if they haven't had sex before. It's rare to find an interesting topic, which everybody can discuss. Interesting + relative + passionate = great conversation. And if there are three things I know about sex; it's that these words describe it well, at least most of the time. ; )
What are your thoughts about sexuality? Are people open enough about it? Do you find people who discuss it honestly and openly? Are you open and honest when discussing it with others? How strong are the stereotypes regarding sex?