How does allowing gay marriage have anything to do with education?

Why do so many people state that their child will be taught about gay marriage in school if gay marriages were legal?

I don’t recall hearing this argument nearly as frequently when civil unions became legal.

It doesn’t, Those are all lies just to get gay marriage banned..because their only real argument is "the bible"..and they know it wont work, because of separation of church and state…so they start making up fake reasons as to why gay marriage should be banned! It’s truly sickening…The reason prop 8 was passed was because people actually believed what the people were saying about gay marriage.,,