Who needs a study?

Sometimes, I really don't understand why people need to do a study to say some things. Was a study needed to prove the sun rises in the east? So why was there a study needed to prove that women drinking coffee cuts depression? Is it a surprise that a stimulant cuts depression? I, for one, don't need a study to tell me that watching a woman have an alcoholic drink cuts depression in men- at least in the short term-LOL!!!