There are people who are not psychologically prepared to marry. According to statistics, the number of unmarried men and women is increasing. What is happening to marriage? However, not getting married doesn't mean that a person will lead unhappy life. There are people who are not married but are living a happy life.
Again, not getting married doesn't mean that a person is not able to seduce a woman or a woman has never been seduced or approached by men. In fact some of the unmarried women and men are dating, it's only they don't want to get married yet.
Hey, I am not advocating people not to marry! It is a hot debate and that is why we should make others understand why people prefer to remain single forever. Here is an article that talks about that issue: Why Did I NOT Get Married?
Why did you not get married? Or in other words, what makes people not to marry?