There is nothing, in today's marriage contract, that is beneficial to men.
Unless you consider going to jail without trial a benefit. (3 hots and a cot can be quite a step up for some)

It used to be that you at least couldn't be accused of rape... but now, the woman who said yes to having an intimate relation with you (at the altar), can say no at any time thereafter.

And everything a man could do to keep his woman in line is now called abuse, and you can go to jail for it.
Including withholding your money from her excess spending.

And the big one "for the kids", well, you have more rights to see your child if you aren't married then if you were.

This is an institution that has killed more good men than any other in recent times.
It should be outlawed.

Enforced monogamy has to be enforced by the society.
The piece of paper doesn't care. Infidelity is no more a reason for divorce than unhappiness.