Wake up and smell the coffee

I went to buy fragrance today. After smelling 4-5 different ones, I lost my ability to judge smells properly. I'm sure it happens to everyone. I bought one too and discovered 1 hour later that it smells differently than I thought it does.

I know you can ask for a cup filled with coffee beans (in most) shops that sell fragrance. What I don't understand is why every customer who walks into the shop and starts smelling different perfumes isn't given a small cup of coffee beans? It surely wouldn't cost much. And it would create a much better customer experience and satisfaction (people really buy the smells they like!).