Marriage is about more than procreation, therefore gay couples should not be denied the right to marry due to their biology.  It is inaccurate to perceive marriage merely as an institution for child-raising purposes. There are many married couples in society today who do not have children of their own, often by choice, and infertile couples, who cannot conceive children, are still permitted to marry. They marry because marriage symbolizes a long-term commitment to one another, not a pledge to reproduce for the state or humanity as a whole. In any case, gay couples may adopt children in countries where they are permitted to do so, revealing society's view at large that homosexual couples can readily act as capable parents and provide loving home environments. Furthermore, the advance of medical science has also enabled same-sex couples to have children of their own through surrogate mothers and sperm donors. It can no longer be said that homosexual couples should not be granted the right to marriage because, either, they cannot have children, or that they cannot raise children adequately. Both claims are evidently false.