Was ethanol beneficial to Jack Kerouac's health?
Rationale first then the answer.
In 1969, at age 47, Kerouac died from an abdominal hemorrhage caused by a lifetime of heavy drinking of alcohol. Ethanol is the main ingredient in alcoholic beverages.. The answer is: no.

Did Charlemagne have a bar mitzvah?
Rationale first then the answer.
Charlemagne was a Roman Catholic. Bar mitzvah is a coming of age ceremony in Judaism.. The answer is: no.

Do guitarist's have fingers that can handle pain better than average?
Rationale first then the answer.
Guitarists typically have calloused fingertips. Callouses are formed of layers of dead skin and usually lack sensation.. The answer is: yes.