3: not every child has a mother and father. Some have no family at all and may never have a happy. They will be raised by the state until they are eighteen years old. Many of these kids would have loved to have any parents, two moms or two dads is better then zeeo.
marriage isn't about kids but the couple, some married couples never have kids.
4:homosexuality not being a crime or mental disorder validates homosexuality. It's already valid.