gay
homosexual
single-sex
adulterous
consanguineous
consensual
couples'
deviant
dynastic
extramarital
fetishistic
gay-marriage
heterosexual
homoerotic
ill-assorted
illicit
immigration
incestuous
interracial
long-standing
male-female
monogamous
monozygotic
nuptial
opposite-sex
polygamous
symbiotic
mixed
mixed-sex
other-sex