Animals made a HUGE evolution making them look all anthro and these animals are sold as pets and they would’ve been normal but the evolution heightened their needs making them want a LOT of affection from their owners, things like hugs, kisses, walks, and maybe some…intimacy which probably explains the need to be 18 in order to buy one. You were one of the humans (you can be a animal if you want) so you saved up your money and decided it was time…to buy your own pet.