Your challenge is to make pedophilia an accepted philia, kinda.
I saw someone spouting that if they legalized gay marriage, the next step would be legalizing bestiality and pedophilia, and ya, it got me thinking; could pedophilia be socially acceptable in todays society, and if so; what changes would you need to make in history for that to happen?
Also, am I the only one who thinks "The Age of Consent" would be an awesome name for a timeline? Unless someone's already used it, I'd like to reserve it for my future (and first) timeline, featuring hedonistic, draka-ish Vikings, settling in South-Africa.