I believe this way: Since in ancient days human kind have had sexual intercourse with many individuals and to bring that under control, the system of Marriage was found - means, one woman for a man. Later that has become like a mandatory duty in society, like, okay - he's 25 and have to get married. Reason : Honestly speaking, to fulfil the sexual needs and for reproduction. No offense, but this must be the truth. After all coming across this fact, i believe that marriage is not a must one! It's my personal view and not conclude on anyone else.. ;)
