Nikah or Nothing

The Nikah is from the ways of Allah with regard to his creation, between the
children of Adam, male and female.

With it there are great benefits, from them: chastity of the two spouses, one to
the other; to fulfill what is required from the husband
towards his wife; the
husband taking care of his wife; and protecting her.

From it is also the fulfilling of the desires of both sexes and from it is having children. There are many benefits from Nikah… The most important thing is
that it keeps you chaste from adultery, from fornication and
the loss of lineage, and from the corruption of moral
uprightness. There is the protection of one’s health.

As for adultery and
fornication then their end place is in epidemics and in
lethal illnesses, as is well- known.

ﻭَﻟَﺎ ﺗَﻘْﺮَﺑُﻮﺍ ﺍﻟﺰِّﻧَﺎ ﺇِﻧَّﻪُ ﻛَﺎﻥَ ﻓَﺎﺣِﺸَﺔً ﻭَﺳَﺎﺀَ ﺳَﺒِﻴﻠًﺎ ٣٢
And come not near to
unlawful sexual intercourse. Verily, it is a Fahishah [i.e.
anything that transgresses its limits (a great sin)], and an
evil way (that leads one to Hell unless Allah forgives him).

[Surah Al-‘Isrā':32]