Gay marriage could potentially lead down a "slippery slope” ending with giving people in polygamous, incestuous, bestial, and other nontraditional relationships the right to marry (2). There is no such thing as traditional marriage. Given the prevalence of modern and ancient examples of family arrangements based on polygamy, communal child-rearing, the use of concubines and mistresses and the commonality of prostitution, heterosexual monogamy can be considered "unnatural” in evolutionary terms(3). This argument is using the “slippery-slope” and “faulty casualty” fallacy. Meaning it described the argument by portraying today’s tiny misstep as tomorrow’s slide into disaster and that because one event occurs then another follows.
Marriage should not be extended to same-sex couples because homosexual relationships have nothing to do with procreation. Allowing gay marriage would only further shift the purpose of marriage from producing and raising children to adult gratification (4). The definition of procreation is reproduction (5). It doesn’t matter how the couples have children, for the fact that they can raise and care for the child as their own and handle the challenges of life as a family. Artificial insemination for female couples and a surrogate mom for male couples are options granting same sex marriage participants an avenue for having a family. This argument is weak because there actually are ways for same sex couples to have children. They may not be natural, but they still count as reproduction.
"The fact is that [it] is not a choice to be black, but it is a choice