Same-sex marriage

Sorta serious post.Long story short, I have a debate coming up regarding the topic. I'd like to hear good arguments on why same-sex marriage should be a thing, as well as possible "flaws" on said argument.Alternatively, it'd also be nice if you could give some claims as to why some people would be against same-sex marriage, and then maybe explain why those claims are faulty or illogical.I know it sounds pretty lazy of me having to ask here rather than just Googling it all up, but I'd also like to hear your thoughts on it.