If you were to have a child, what would be your main reason?
To make mom/dad happy.
To satisfy maternal/paternal instinct to have children.
Because all my friends are/will be having them.
To spread my DNA/genes.
For satisfaction I'd get from bringing something hopefully smart & good (any interpretation) into this world.
To correct my parents' mistakes in raising me.
To have them take care of me when I'm old.
Because I haven't achieved anything in life, maybe my children will.
Because it'll be too late (physically) otherwise.