Lol, indeed, the ambergris might, if fresh, have a less pleasant smell, i.e. citing:
"Freshly-produced ambergris has a marine, fecal odour. However, as it ages, it acquires a sweet, earthy scent, commonly likened to the fragrance of rubbing alcohol, without the vaporous chemical astringency."
It was highly valued as a fixative for perfumes, but too rare, and it has been widely replaced by synthetic "ambroxan".
https://en.wikipedia.org/wiki/Ambergris