If scientists studied more important things they would look at the effects of a haircut on productivity. Next they would study human output after a shoe shine. And the creative capacity of a person smoking a fine cigar.
The ability of an individual to solve complex problems while taking a hot shower.
The negotiation skills of a person after a good cup of coffee. The effect of a glass of wine on conversation.
How a freshly starched shirt and sharply creased dress pants improve presentation skills.