it really isn't that ridiculous, i personally don't get that many spots at all, but i've licked my finger and applied saliva to any wannabe spots, my uncle told me about it, some herbal doctor from nearby village in India where my family are from told him about it yonks ago.. anyway, i and my family don't get spots, so maybe it works, or who knows maybe we just have fortunare genes in that area, but even that makes sense.. how many land mammals do you see lick themselves? a lot, and how many spotty faced animals do you see?? there are natural enzymes and bacteria in saliva.. and in toothpaste there are similar properties to break down crap.. so in theory it makes sense.. either way toothpaste smells better than any spot cream or saliva.
though Kenzie isn't eactly spot free. so maybe i'm talking crap. i'll say one thing though my sister who i imagine shares very similar genes to me, refuses to apply saliva, and she gets way more spots than i do, even though its safe to say she eats better than i do, and is all round more healthy than me. so go on everyone lick yourselves!!