It’s a perfume; no, it’s a cologne; no, it’s an aftershave…ok, I don’t know what it is

There really are definitions for these fragrances. It's based on the percentage of essential oil (or synthetic fragrance oil) to total weight. Perfume's the heaviest and aftershave the most diluted. And everything else is somewhere in between. Here's the general breakdown: Perfume - 20% to 30%, Cologne - 15% to 20%, Eau de Cologne - 12% to 17%, Eau de Toilette - 5% to 10%, Aftershave - 2% to 5%. And now you're ready for jeopardy perfume definition day...if it should ever come up.