by your own logic the debate is redundant. even the most altruistic personalities derive some sort of gratification from their benevolent behavior. if they receive gratification or satisfaction, they are acting in their own self interests. this shows that selfishness is a human condition. perhaps not THE human condition, but certainly an inevitibility.
otherwise, you could also say that having a child is the ultimate in selfless act, depending on which entity outside of yourself you wish to surrender to. if your life belongs to god or society or whatever, and these entities compel you to spawn offspring, the faithful servant will be selflessly respond, regardless of his, her, or the child's well being.
this is not to say that either of those paragraphs reflects the position that i take, but it is something to chew on for a moment.