Sniffing a beaver's butt: a surprisingly pleasant experience

From a National Geographic story by Mollie Bloudoff-Indelicato, the quote of the week:

“I lift up the animal’s tail,” said Joanne Crawford, a wildlife ecologist at Southern Illinois University, “and I’m like, ‘Get down there, and stick your nose near its bum. People think I’m nuts,” she added. “I tell them, ‘Oh, but it’s beavers; it smells really good.’”

Crawford is talking about castoreum, a naturally occurring anal secretion found in beavers. The furry animals use it to mark their territory. We humans, however, have also found uses for castoreum. Most notably, as an ingredient in vanilla-flavored and vanilla-scented products.
Pictured: Hardened lumps of beaver anal secretions, as stored in the Deutsches Apothekenmuseum, Heidelberg Castle,