Trans 101

I began to write down what I thought people should know about transgenderism if it was their first foray into the area. If you were sitting in a room with me, and I was explaining what "transgender" means in the simplest terms possible, what would I say?

I hate to go back to Trans 101 material after earlier having been able to use words as complicated as "cissexist" without any explanation, but I want there to be no doubt as to what I'm talking about among people who don't know better or don't want to know better.