Modern symbols of heterosexuality in societies derived from European traditions still reference symbols used in these ancient beliefs.
The term heterosexual or heterosexuality is usually applied to humans, but heterosexual behavior is observed in all mammals and in other animals.
and the Latin word for sex (that is, characteristic sex or sexual differentiation).
The term "heterosexual" was first published in 1892 in C. Chaddock's translation of Krafft-Ebing's "Psychopathia Sexualis". The noun came into use from the early 1920s, but did not enter common use until the 1960s.
The colloquial shortening "hetero" is attested from 1933.
One of the first uses of the word in this way was in 1941 by author G. It is now simply a colloquial term for "heterosexual", having changed in primary meaning over time.
Some object to usage of the term straight because it implies that non-heteros are crooked.
The Genesis states that God created man because "it is not good that the man should be alone; I will make him an help meet for him." ( Now for the matters you wrote about: It is good for a man not to marry.
But since there is so much immorality, each man should have his own wife, and each woman her own husband.
These religions tend to view all sexual relations as sinful, and promote celibacy.
Other religions view heterosexual relationships as being inferior to celibacy.
Heterosexuality is romantic attraction, sexual attraction or sexual behavior between persons of the opposite sex or gender.