Please don't try to explain it to me, either...it makes my head hurt...

With Robin, it's hard to tell!

I think it means that whoever told you about this "binary of gay or normal" beleives that people think that you are either a normal person or a gay person. This isn't true, but what the heck. It doesn't really have anything to do with the 76 genders movement (aka a joke taken too far) as it does with the LGBTQAIJKLMNOPQRSTUVWXYZ++ movement