Sexual naivete, ignorance and openess

Everyone is different when it comes to their sexual experience.
Some have never had sex, and so can only hope and dream about what it would be like, with an almost naive sense of pleasure - that it will be perfect, or an enlightening experience, and that it will change their lives forever.
For some, it may have.

Others who have done it either like to keep the details to themselves and their partners, maybe sharing the odd story now and then, while others are so blatantly open about sex that it's just so normal for them, while it makes the majority of us blush.

How open are you when it comes to talking about sex with people - your friends, family, people you've just met - and public displays of affection that can be borderline sexual acts - the 'GET A ROOM!' sorta thing.
Do you think EVERYONE should be open to it?
Is there a time and place?
Should it NOT be discussed at all?

I ask because at my friend's bday on sunday, he showed off his new girlfriend.
She is totally different to his last gf. Both are asian (he has a thing for asian chicks, but thats a different subject), but his ex was conservative, though curious, while this one was outrageously and blatantly open about everything.

They would make out at random times, she would talk about her fuck buddies, where to poke her to turn her on, and she even straddled me and started doing humping motions and making the sounds while I was trying to sing.
It made our group fairly uncomfortable, I have to say.

I would say I'm conservative. I'm ok with sexual openess, as long as everyone is mature about it, and not in the mindset of 'OH LOOSEN UP STEVE! HOW MANY TIMES DID YOU FUCK HER! I PLOWED HER ALL NIGHT HAHAH!' sorta thing.
I don't talk about that stuff with my parents or my family, its just too weird.
That's just how I go about it.

Jam it back in, in the dark.

One of the most hilarious things happened a month or so back.

My friends came over, and because it was hot, we all went into my room for the air con.
There was a couple of girls in the group, and we were all tired, so I was just on the computer while the two of them were on my bed. The others just bummed around with the DS and the Gamecube.

It was after they left that i realised how conservative my mum is.
She sat me down in my room, and gave me a long ass lecture about how I shouldn't invite girls into my room, and that allowing them to sleep in my bed was wrong. I told her they were just my friends, but mum insisted on what I did was wrong and not allowed to happen again.
Mentioning that they had boyfriends made it worse, cause mum immediately thought we were doing things behind their boyfriend's backs.

Seriously, if my parents flipped out at seeing i had friends who were girls, they would blow up or something if i told them I've had sex before.
I dont get them sometimes.

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My friend has that problem.
He's gay too, and everyone except his parents and other family members know. They would immediately disown him if they knew - that was what happened to a cousin of his who came out, apparently.

One of other problems I have with my family too is that because I don't openly discuss my liasons with girls, they think I'm gay. Which, quite frankly, is insulting, even if they are joking around. However, if i DO discuss it in any way, they'll give me lectures and scream at me at how immoral I am.

This thing is sticky, and I don't like it. I don't appreciate it.