Erotic plasticity is defined as the degree to which the sex drive can be shaped and altered by social, cultural, and situational forces.

Erotic plasticity refers to the degree to which an individual's sexual orientation, desires, and behaviors are flexible and can be influenced by social and cultural factors. Individuals with high erotic plasticity may experience changes in their sexual orientation or desires in response to different social or cultural contexts, whereas individuals with low erotic plasticity may experience more stable sexual preferences and behaviors across different situations.

Some examples of factors that can influence erotic plasticity include cultural attitudes towards sexuality, exposure to different sexual stimuli, and social norms surrounding sexual behavior. For instance, in cultures where there are more permissive attitudes towards sexuality, individuals may have higher levels of erotic plasticity than in cultures where sexuality is more stigmatized. Additionally, exposure to a wider range of sexual stimuli (such as pornography or different types of sexual experiences) may increase an individual's erotic plasticity.

Research has also suggested that there may be gender differences in erotic plasticity, with women tending to have higher levels of erotic plasticity than men. However, this is a topic of ongoing debate and research.

It is important to note that while some degree of erotic plasticity is common and normal, it should not be used to pathologize or stigmatize individuals with non-heterosexual orientations or preferences.