Why do people want to get married?

I personally prefer to stay immature for the rest of my life attending to my narcissistic needs. I don't like my parents saying your just being a teen but Ive been like this for 5 years and I'm 17 now. I just cannot comprehend why a person would like getting married and attending to their wife's needs. After I masturbate to one chick I want to masturbate to a different chick, I would get bored having or masturbating to the same chick. I also would rather stay immature and play video games and maintaining to my career while mooching off of others. Why do others prefer to get married?