A. Yusuf Ali:Translation:
And among His Signs is this, that He created for you
mates from among 3525 yourselves, that you may
dwell in tranquillity with them, 3526 and He has put
love and mercy between your (hearts): verily in that
are Signs for those who reflect.

Muhammad Asad:Translation:
And among His wonders is this: He creates for you mates out of your own kind. 15 so that you might incline towards them, and He engenders love and tenderness between you: in this, behold, there are messages indeed for people who think!
3525 This refers to the wonderful mystery of sex. Children arise out of the union of the sexes. And it is always the female sex that brings forth the offspring, whether female or male. And the father is as necessary as the mother for bringing forth daughters.
3526 Cf. 7:189. Unregenerate man is pugnacious in the male sex, but rest and tranquillity are found in the normal relations of a father and mother dwelling together and bringing up a family. A man's chivalry to the opposite sex is natural and God-given. The friendship of two men between each other is quite different in quality and temper from the feeling which unspoilt nature expects as between men and women. There is a special kind of love and tenderness between them. And as woman is the weaker vessel, that tenderness may from a certain aspect be likened to mercy, the protecting kindness which the strong should give to the weak, (see also 4:1).