Since you mentioned sex in reference to being open minded...
Many here are from the US. The US has some pretty strong Puritan and Victorian beliefs in its history, a lot of which is still here today, we just don't openly admit it. Unlike some other countries, we are taught sex is shameful, embarrassing, wrong, evil, of the Devil, un-God-like and a host of other negative messages one hears growing up in this country.
But we all are human and everyone knows no matter what messages you send, people are still going to have sex. So we allow for it between one man and one woman, in the bedroom, behind closed doors and only after they are married. That's okay. No one will give you crap about that. Just make sure you don't talk about it! And don't ever tell anyone you're doin' it every day. People won't like you. But if it produces children, you are blessed! After all, that's why God created sex, right?
So whatever lack of open-mindedness you perceive on this forum is most likely because it's so prevalent in this country. And we are the United States of America and we are used to getting our way.
Now let's put all this talk about sex back where it belongs, in the bedroom, behind closed doors...
"Honey! We're out of K-Y again!"