Gender differences in erotic plasticity are best illustrated by the fact that women

A) have longer refractory periods than do men.
B) tend to be more changeable than men in sexual orientation.
C) are less likely than men to be equally aroused by male and female erotic stimuli.
D) become aware of their sexual orientation much earlier in life than do men.

Erotic plasticity refers to the degree to which individuals' sexuality is flexible and responsive to social and cultural influences. Research has shown that women tend to be more sexually fluid than men, meaning they are more likely to shift in their sexual orientation over time and be aroused by both male and female erotic stimuli. This is in contrast to men, who generally have a more fixed and stable sexual orientation. Therefore, option B is the correct answer.