Sexual Orientation

Heterosexuality Sexual attraction to those of the opposite sex
Homosexuality Sexual attraction to those of the same sex
Bisexuality Sexual attraction to both those of the same sex and to those of the opposite sex

You are gay if...
You are primarily sexually attracted to persons of the same sex. That's it. No other behaviors, fantasies, or dreams have anything to do with whether you are gay or not. If you dream from time to time about a homosexual encounter it does not mean you're gay. If you are artistic, like to dance, and aren't afraid of raising your elbows above your shoulders on the dance floor, it does not mean you're gay. However, if are sexually attracted to others of the same sex the majority of the time you probably are gay.

Lesbian A woman who has a homosexual attraction to women.
Homosexual A person who is primarily sexually attracted to the same sex.
Bisexual A person who is sexually attracted to both men and women.

To be gay, or not to be gay. That is the question?
Opinions conflict as to why an individual has a certain sexual preference. Some scientists believe it's mainly determined by genetic makeup, while others believe environmental influences and experiences ultimately determine an individual's sexual orientation. Still others believe it's a combination of these two things that determine an individuals sexual preference.

Fun facts about homosexual slang
"Homos" is the ancient Greek word for "same"
"Heteros" is the ancient Greek word for "other"
"Lesbos" is a Greek island where Sappho a Greek female poet lived and wrote about friendship and love between women at around 600 BC