[M4F] You were home alone, sexually frustrated and curious. You thought you'd just touch your family dog and that would satisfy you... You didn't realise just how massive he was, or just how carried away you were about to get!
(A4gm or gm4A) mabye it's because of magic, or mabye some mad scientist created feralifing nanobots, or mabye god just got bored. Still, not matter how it happened, people seem to turning into large, horny, fluffy, and feral animals at seemingly random!