Heh, good thing i like boys. The worst thing I could get is... AIDS, lol. Still better than babies tho.
Anyway, with that put a side, it's his own fault really, if you think about it, he should have put his teenage hormones a side and put on a freakin condom. Everytime you have (heterosexual) sex, you will have a chance conceiving a child.
Well, the the best thing he could do now is to hire a lawyer and get as much out of it as he can.