Why you don't get married as a man.

The average age of retirement in America is 61 years old. The average age of a man that gets married is 25, + or - 2 depending on demographics.

61-25 = 36 years from marriage to retirement of protecting and providing for a wife and kids. Men who take up the protector/provider role die 7 years on average earlier than their wives.

There are 52 weeks in a year. 52x36 = 1872 weeks.

The average work week in America is 40 hours per week.  1872 weeks over 36 years x 40hour work weeks =  74,880 hours of providing for a family. (keep in mind many married men do 50-70 hour work weeks, but we'll go with average)

Now if I stay un-married, don't have kids, I can cut that down in half only providing for myself which leaves 37,440 hours of free time. Time that I would have never achieved if I married and had kids.

If that is selfish, you're damn right that is. A cursory look at the divorce statistics and how awful family courts are toward men is a good enough motivating factor to not seek out marriage.