I'm sorry, but those arguments are laughable. How does legalising same sex marriage have anything with an increased demand for legalised polygamy; the two have nothing to do with each other and you will find that in many places around the world there are just as many, if not more, heterosexual polygamists.
The push for same sex education in schools is not so that teachers can give explicit details on the finer points of gay or lesbian sex; it would the equivalent of sex ed lessons for heterosexual sex, not some kind of gay indoctrination which FCR seems to think it would be.
Fair enough, forcing Catholic church adoption services to allow gay and lesbian couples to adopt could be controversial, but denying these couples the right to adopt is no better than denying a couple the right to adopt because of their skin colour. It's also taking away the chance of tons of kids at getting a happy, stable, loving home.
Nondiscrimination laws are exactly that - they stop discrimination against ANY minority, including LGBT people but also ethnic and racial minorities or those with disabilities. It's not trying to force a gay agenda on you, merely trying to protect us in the workplace.
I love how the monogamy arguments always comes out (pardon the pun) or about the sanctity of marriage; I'm sorry, but just look at the numbers of heterosexual marriages that break down each year because of infidelity. We are not universally sex-crazed cheaters, some are unfaithful, but only the same as some heterosexual people are unfaithful.
Gay marriage, or being gay, has absolutely nothing to do with the length of the marriage; you could make the same passing statement about any kind of couple ('a mixed race couple reduces marriage length' etc) and it would be equally false. The length of the marriage depends on the people involved, NOT the kind of couple it is.
'Fewer children would be raised by a mother and father' and 'more children would grow up fatherless' - that's happening already thanks to how easy it is to get a divorce nowadays! Millions of children are raised in single parent families and do just fine, so how would a child coming from a family where there are TWO loving parents be any worse off.
Birth rates slowing down slightly is hardly a bad thing, but if a gay or lesbian wants children that are biologically one of the couple's it's entirely possible. It comes down to choice, not sexuality. Personally, I hope that when I come t having kids, my wife (because hopefully by then I will be allowed to marry properly) or I will be able to have our kids, but if not there are many other options.
It infuriates that is people like you, who oppose something that has nothing to do with you on the basis of weak arguments, are the reason why currently people like me cannot get married in the UK, most states in USA and the majority of places around the world. Do you really want to know what would happen if, shock horror, gay marriage was legalised for example. This: