What is marriage ?
Marriage by it's monogomous nature is either something one agrees to because of religious beliefs or it's a woman made notion to give security.
Men are genetically programmed to want to procreate with as many women as possible. We are made to spread our seed.
Women are genetically programmed to find a man to provide offspring & security. Case in point is how often we see ugly, wealthy men with beautiful wives.
So, whose idea was monogomy ? It suits women moreso than men.
Obviously the lines have become blurred recently with women having financial independence etc. But right back to the origins of our species this was the case.
Hence, most commonly the 1st born will have a resemblance to the man. This is natures mechanism to try & make sure the man will stick around & provides for the offspring.
As humans we are blessed with the ability to make decisions that are not governed solely by our most basic instincts to eat, sleep & procreate as often as possible. Most animals are this basic & it's what marks us apart.
I am not saying that marriage is a bad deal for men but I am saying that it puts more pressure on them to adhere to the principals of having a sole, life-partner.
Marriage is a good idea for society as we know it. The family unit provides the security & conditions to raise children well but we are still programmed to want to shag half the women who cross our path.
"I don't want to go to heaven. None of my friends are there."
Oscar Wilde