It's not animalic, but the fossilized amber oil from Eden Botanicals is all the "dirty" you could ask for, and one of the best natural fixatives I've ever used. It kicks butt all over ISO E Super, even diluted to 5%, and it's not any more expensive. When combined with even some of the more delicate musks you get a earthy complexity that can turn any fragrance to the dark side, and with even trace amounts of oak moss it like, well.....living, and perfectly dirty. Castoreum, in small amounts, comes off like leather to me (and butt in larger amounts). Ambergris is one of those unpredictable components at times, but along with musks can make your scent into something alive. I notice a lot of French perfumes feature prominent animal notes. I've never understood the obsession with jasmine (which smells like a floral fart to me), but when used with the same discretion as the true animal notes, can do some neat things to an otherwise boring fragrance (same with narcissus). As a novice (in the most humble sense of the word) I am consistently amazed how truely narcotic results can be achieved by blending several things that, on their own, smell like poop (I know....duh. Still, its a big part of why creating GOOD perfume is not something that can be done easily, or casually.) Awesome thread, and great information...thank you.