Talking about origin story of essential oils:
Musk - deer butt
Civet - civet cat butt
Castoreum - beaver butt
Edit: Also to add, back in the day, one of the reasons I believe why perfume was created was to cover the natural BO smell of people making them smelling "pleasant". Ironically, in the modern day perfumery, cumin, which gives off a smell of BO, is being used in making perfumes to be used by people to make them (us) smell good.