A Het is a Heterosexual person. Being Heterosexual is the quality or characteristic of being romantically, and sexually attracted to the opposite sex or gender. Heterosexual men are attracted to women, and heterosexual women are attracted to men. People who are Heterosexual are referred to as "straight".
Heterosexuality is the basis of civilization due to the fact that it leads to reproduction. Reproduction is possible only through Hets.