There does exist a letter sent by Napoleon Bonaparte to Joséphine de Beauharnais urging her to not bathe until he arrived home from Austria in just over a week's time.

This does suggest a certain arousal by strong smells from below.

I have always been aroused by the scent of a woman when she becomes excited. And I have always known when a woman was aroused (this tends to be a deep concern of most women, as they usually think that they smell "funky" in a not-nice way when they are).