I will highly encourage that my children live in "sin".
I want my children to live with their partners before getting married. I truly believe it would cut down on divorces if you live with your partner first, for a good 2 years BEFORE getting married.
I also want my children to have sex with said partner before getting married as well.
It is so much easier to break a lease, then get divorced when you realize that you are living with the wrong person.
I don't want them to feel the need to get married young because they want these experiences and then realize their mistake.
I feel very lucky that my husband and I have made it to 9 years and are going strong. We were married at 21, neither of us had lived with another person and it was a hard first few years getting to know each other in a completely new way.