I recently started watching Star Trek: Enterprise, and a prominent issue raised by T'Pol and other Vulcans—namely, the monks in "The Andorian Incident"—was human odor. One of the monks at the temple said that "the smell must be unbearable," and T'Pol was reportedly given a "nasal numbing agent," and did not eat human food.
I have not watched as much Star Trek as others might have, but was this problem ever mentioned before? And if it was, was it considered as serious a problem as described in Enterprise, a series that comes after most of the others, even if it was set before them?