A person who is attracted to the opposite gender.
Heterosexuality is the most common
sexual orientation in the world (but by no means "normal". It is simply more common than some variations of human sexuality).
Only tiny
minorities are exclusivly heterosexual or exlusively homosexual (somewhere between 2 to 5% each); most are somewhere in between those two extremes.
Slang terms for heterosexuials include straight.
Many (ignorant/prejudiced) heterosexuals like to abuse or try to change sexual minorities, like homosexuals (who love members of the same sex), bisexuals (who love both sexes), pansexuals (who are love anybody; male, female,
intersex, whoever), and asexuals (who have no sexual desires whatsoever), and seem to believe that these people can become straight, despite that sexual orientation is pretty much fixed for life.
What causes
heterosexuality? People always ask what causes pan-,
bi-, a-, and homosexuality, but hardly question heterosexuality.
