25 ? That's pretty young for having kids... Well, at least for me. You're not sure if the girl you're with is *the* girl. What if she leaves you after having two childrens, sue for a divorce and take the kids, the house, the car, half of your pension fund (if you have any) and a generous check every months for the kids... Leaving you with a tiny little apartment with almost no money.
"Fathers for Justice" was not created for nothing !