Why don't some people want to marry? The netizen comments on good intention acid

I have an elder brother, this year many years old 40, can not marry namely. Ask a reason, saying is to hope to establish line of business get married again. Do you feel why don't some people want to marry? Do not marry, need not give birth to the child, need not look after children, not heavy male light female, need not worry about a teacher, the president, the classmate is hellion, need not buy a room to buy a car to the child, marry son's wife, take grandchildren to be scolded even. I think after hundreds of thousands of a few all ages, nature ecosystem won't not marry because of me the influence is developmental. Say you beside do not think what reason marrier is? Does greeting complement leave a message ~ ?