Most men I know simply don't see any advantage to marriage. 

I hate to say it, but it's "what's in it for me"?

The 2 things marriage used to provide - sex and someone who would look after the home no longer exist within marriage.  So what is it exactly I'm getting with it?  The only thing IMO is children.  But if you don't want kids or don't care about them?  Why would you ever get married?  I'm dead serious.  I don't see any advantage only downsides.