2. Heterosexual marriages are valid because they produce children. Infertile couples and old people cannot get legally married because the world needs more children.
3. Obviously gay parents will raise gay children because straight parents only raise straight children.
4. Straight marriage will be less meaningful, since Britney Spears's 55-hour just-for-fun marriage was meaningful.
5. Heterosexual marriage has been around for a long time, and it hasn't changed at all: women are property, Blacks can't marry Whites, and divorce is illegal.
7. Gay marriage is not supported by religion. In a theocracy like ours, the values of one religion are always imposed on the entire country. That's why we only have one religion in Australia. *note I replaced America with Australia, but there is no difference.
8. Gay marriage will encourage people to be gay, in the same way that hanging around tall people makes you tall.
10. Children can never succeed without both male and female role models at home. That's why single parents are forbidden to raise children.
12. Civil unions, providing most of the same benefits as marriage with a different name are better, because a "separate but equal" institution is always constitutional. Separate schools for African-Americans worked just as well as separate marriages will for gays & lesbians. *note, I didn't bother getting rid of the American reference here, as it does actually apply to the US. But we all know what the point is talking about.