I know we bitch a lot about PETA's exploitation of women in the service of animals, but maybe we shouldn't, because they've moved on to something even more objectionable: Justin Bieber. Yes, the Biebs is doing another PSA encouraging animal adoption from shelters. Since he speaks in tweets anyway, it's no wonder the ad's headline is, "Animals can make U smile." At least we don't have to see him naked. Full ad after the jump.