Religious marriage, Legal marriage, Love, , Reproduction. Are we demanding too much of one partner?

Basically, what youre suggesting isnt the way God intended marriage to be. Marriage is to be between only one woman and one man period. Also there arent enough people on earth to do this without overlapping in many situations which would only lead to jealousy and many, many problems within. So be lucky enough to find your one perfect soul mate and then be happy with them, as together love can truly do some very miracalous things if allowed