Childless married heterosexual couples have the most egalitarian labor divisions.
People of the opposite sex are sexually or romantically attractive to heterosexuals. Both heterosexual men and heterosexual women have feelings for or are attracted to one another emotionally or sexually.
Heterosexuality is a sexual preference that is defined as "an enduring pattern of emotional, romantic, and/or sexual attractions" to people who are the other sex.
It also refers to a person's sense of self-identity that is based on these attractions, associated behaviors, and membership in a group of individuals. Straight is a term used to describe a heterosexual person.
There is not a single, clear-cut factor that determines sexual orientation, but scientists think that a combination of genetic, hormonal, and environmental factors does.
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