The phrase "the opposite sex" is commonly used to refer to individuals who identify as a gender different from one's own. However, it is important to note that this phrase can be perceived as problematic because it reinforces binary gender norms. There are alternative phrases that can be used instead, such as "people of different genders" or "individuals of different sexes." Additionally, using specific gender identities such as "men" and "women" can be more precise and inclusive. It is important to consider language and how it may impact others, as using more inclusive and respectful language can create a safer and more welcoming environment for all individuals.