legitimises the relationship from society's perspective... and while that might mean nothing to you it obviously means alot to most women... and if it doesnt change anything for him then why not do it.
Also, I dont know if any of you dudes work in a corporate environment but none of the partners at the advertising firm I work at are single in their 30s... it would definitely make you look out of place if you didnt have a wife at 35 and your a professional...
its good for money to have a perceived level of stability and show even if it falsely, that your willing to adhere to basic societal expectations.
And some of these dudes will be in their early 40's getting a divorce and now having to move into an apt b/c their wife got the house.
Societal rules are DEAD. Do what you NEED to do for yourself.
I don't know what color you are, but it's easier for white dudes to get married literally at any point from college on into their 30's because the population favors their odds of easily finding a woman and society views them as the "ultimate catch". It's not the same minorities, espxcially for black dudes.....unless you live in a place like DC or ATL or a select few other places with high black population. Your chances of finding a mate are greatly diminished from that of a white dude with your
Myself and all of my cousins, both male and female, all with degrees all doing positive things, none married(one was but got divorced). That's just the way it goes sometimes and it's better than "playing the game" aka settling, when you already know a loss is eminent down the line. All that "money" you make from your image of being married family man will be gone and you might even be worse off than you would have been otherwise.
since then she has really been twisting the screws. 
