Heterosexuality is the romantic or sexual attraction to people of the opposite sex or gender. A person who is heterosexual is commonly referred to as straight. For example, heterosexual men are attracted to women, and heterosexual women are attracted to men. The term "heterosexual" comes from the Greek prefix "hetero-" meaning "different" or "other," and describes attraction to the other sex. Heterosexuality is one of the main sexual orientations and is considered the most common worldwide. It can also describe sexual behavior between individuals of opposite sexes. In summary, being heterosexual means being attracted emotionally, romantically, or sexually to someone of the opposite sex or gender. This has been the normative and most socially dominant form of sexual orientation in many cultures.