Whether you'd like to share your personal lives with us or not, we know how the modern relationship works these days. I don't expect my kids to live according to my expectations but I do want them to show their parents respect while they are at home. They are free to do whatever they want at their place anyway.
I wish kids would understand how hard it is for parents. I've raised my kids with the values and morals that I grew up with. It's the best I could do, it's the only way I knew how. When I see my kids carrying those values as adults, it gives me confidence that I have done my job well. It gives me hope that they will teach the same things to their kids. And that's why I would want them to expect to share a bed with their girlfriend or boyfriend.