No. If that were true, the global population would be 50% male and 50% female, amongst other things. On the other hand, for those who do marry, I believe the person they marry is their "one special person" - you get out of marriage what you put into it, and if both partners decide to devote themselves to the marriage and put the effort into it, things will work out splendidly. But as they say, it takes two....
Are you sleepy?