live together and have kids first, marriage is a second step only if you two have kids and love each other.
What if you don't wanna marry after you have 2 kids??
What is love? You also said rushing into marriage and taking responsibility is a big mistake, so what you mean is that marriage = responsibility, agree! What about those 2 kids? 2 kids without a mother or father, the one doesn't live with those 2 kids or one of them excaped the responsibility before he decided to love her body or her mind.