A couple can have a lot of fun researching the art of kissing, strictly for research purposes of course. There are two kinds. There is the professional taster hired to detect poison before a king or queen eats something. More commonly, people have jobs to evaluate the savoriness of certain foods. For example, companies that sell potato chips make sure that their chips will make just the right sound when you crunch them to be appealing.
Chocolate manufacturers worry about the feel of the chocolate melting on the tongue.
If you just extrapolate that to all the different companies in the world who sell food, you could see how many tasters would be needed. There are also professional noses who create scents, and you might think of them most often as creating perfumes. They also create the scent that goes into toilet paper, magazine ads, clothing, etc. We live on the leash of our senses. Everything we know about the world comes to us through our senses.