Obama wins hands down for me, McCain is against federal funding for sex education, and iirc Palin is in favor of abstinence-only sex education (which I don't think works).
How fucking old douche bags with tons of kids can forget how strong their own urges were baffles me. All the stats agree, abstinence only sex education teaches kids only to not talk about having sex, so they do it with no fucking clue of safety, and without the support of their parents.