To go off topic a little, I'm very curious where the OP grew up so I could understand where condoms were illegal? Italy? Germany? Ireland? I know it was illegal to advertise them, but to actually buy them? Wow -- I had no idea!! Not saying it wasn't so, but just really curious.
I've thoroughly read this train wreck of a thread, and even though I had a helluva time reading the OP's thoughts (please use paragraphs) I think I have to agree with just about everyone above. I apologize in advance if I didn't understand something.
I've raised three adult children without blocking their sexual education. They were NOT taught about sex in high school and condoms were NOT available to them unless they went to a district health office. It was OUR responsibility to educate our children about sex and it was open discussion in our house. Believe me when I say it was always discussed. They know about our toy box and they know their parents are a bit "out of this world". Questions were ALWAYS answered honestly and they have all grown into wonderful adults who enjoy sex. They are old enough now to make their own decisions about sex, and if they wanted to talk about sexual experiences, fine by us. Sometimes TMI, but as good parents do, we listen.
The Swingers Board website is pretty much always up on my laptop and I don't hide my laptop. It's either on my kitchen table, on the livingroom ottoman, chair, where ever. I've got my youngest two still living at home with us. It wouldn't take a rocket scientist to find it on our computer. There is an icon on our toolbar and one on my desktop. If they have questions, fine. While we are open to talking about sex with our kids, we don't share what our sex life is like. To our kids, that's a TMI, anyway and I know they prefer not to know anything about it.
Would I ever introduce our kids to the swinging lifestyle? No. Our oldest child knows about our swinging lifestyle. I wouldn't be surprised if the other two know about it, too. Our one daughter who does know accepts our lifestyle, but she still can't wrap her head around how we can share partners without jealousy or wanting to rip the hair out of our spouses partner. It's totally incomprehensible to her. It's a matter of maturity with her, and she's not mature enough to understand, just like we weren't at her age. We lived monogamously for twenty-two years. We started exploring swinging a few years ago and have found that it highly enriched our marriage and the way we communicate. Even though that's a plus to us, our kids can't understand how having sex with others can make our marriage better. They may never understand and that's OK.
When the OP talks about having a daughter meet a sex partner, it sounds as if the parent is pimping her out. Like many have mentioned, sounds illegal and against her will.
In summary, I have no problem teaching my kids about sex education. I refuse to include our lifestyle in that conversation. If we didn't participate in this lifestyle, I still wouldn't bring it up.