No they don't, here's what will happen: she wants the baby partly b/c she thinks it'll get him to stay around home (once they move in together) more often. He may live up to that OR (feeling pressured) he may be "gone" even more b/c of the added responsibility (especially @ such a young age) & her nagging/complaining. They'll have unsatisfying jobs just to stay afloat, be miserable, fight a lot & fuck up the kid. Then they'll eventually break up, do the shared custody thing, bring new boyfriends/girlfriends into the mix & complicate things even further - all to the detriment of the kid. And life goes on & everybody's unhappy.

Fuck, I hope I'm wrong but it happens so often...