For me things come in a clear order: marriage then kids. I do understand that some pregnancies aren't planned, but for those who actually PLAN to have a baby with a boyfriend: why? A kid is a comitment greater than a marriage, why skip this step and going right to having a baby together?

If a dude didn't prove he is consistent enough to marry you, don't have kids with them! If the dude is already getting the whole deal without marriage, I don't think he'll want to do it afterwards.