I completely agree with waiting to introduce children until there is a serious committment of some kind, the type of committment that leads to marriage. I don't mean to sound old fashioned, but I would never live with a man in front of my children. That's not a judgement thing, I know people that do it successfully, but I had been together with my daughter's father 6 years when she came along. We owned a house, cars, both had good jobs. The baby came along and he didn't want to be a father. Being married wouldn't have made him want to be a father, but I should have known better to stay with someone that didn't share my same views on that.
I have men that are friends that I had my kids around, but the romantic ones, no way. If things didn't work out, my kids didn't know a single thing about it.
I know many women who think their kids have a right to know everything and I disagree. Kids don't need to know all about adult stuff. It's not good for them when they are too little, if you ask me. I think a man and woman should get to know each other first and figure out if even the two of them are going to be serious, let alone bring the kids into it before figuring any of that out.
It saves a lot of heart ache and confusion for the kids, if you ask me.
Just my opinion.