Ok, so the government decides to impose a legal age limit on marriage. They decide you have to be at least 18 to get married. You guys are doing the equivalent of saying, "Oh but if you make it 18 then 17 & 16 year olds will also argue that they should be able to get married. Maybe we shouldn't let 18 year olds get married"

This type of argument has been used against expanding the vote to women to interracial marriage. Why is this a valid argument now?

Fair play!