As an aside, there is a brief enumeration of some of the ways that woman’s physical exposure constitutes sexual excitement. A woman’s leg, a woman’s voice, a woman’s hair, all these have led to restrictions – covering up - in traditional Judaism. The principle of tzinut or “modesty” has seen women fully cover their limbs, hide their hair under shawls or wigs, and temper their voices (the last being among the reasons that women were excluded from being Cantors until the 20th century).
What is usually left out of these discussions, though, is the fact that the text places the emphasis on the one who “gazes” (presumably the man). “If one gazes at the little finger of a woman, it is as if he gazed at her secret place.” The man is presumed to have the responsibility to control himself. Leering is the problem, not exposure.
Except for the married man, when he sees his wife. Presumably that kind of arousal is not a bad thing!