Pregnancy is unfair for women, it is a difficult period of time, a painful birthing, then you have to spend your money to support it for 18 years minimum, which takes away money from other more enjoyable things like beach vacations and big screen TVs. It is easier to have a cat or dog. The new family unit is to maximize the household income and minimize liabilities, which is: Husband, wife, and dog. The new family unit. Animals can fulfill the maternity experiences of a person. Human population growth is bad for the environment too.