A popular additive to many perfumes, Ambergris, comes from the intestines of sperm whales. When it’s fresh, not surprisingly, it smells like crap, but then later begins to smell sweet and ‘earthy’. – WTF Fun Facts
Source: https://www.businessinsider.com/whale-poop-perfume-ambergris-why-its-expensive-2019-1
WTF Fun Fact – Sweet Sperm Whale Ambergris

Sooooo. Someone thought: Hey let us keep this weird piece of crap that smells Horrible and wait some time. Then they added it to stuff that should smell nice…