The titel explains it. Everyone in FMA(B) starts arguing just because of Envy's gender. Poor Envy, he-- she-- he--- THEY had to witness wtf happened in chapter one..

I don't know what I was getting my hopes up for. What type of girl would fall for a suit of armor? *** Alphonse Elric is a fuzzy, cat-loving, soft-hearted fourteen year old kid. There's just one thing about him that may be a bit... unsettling. He doesn't have a body. When you come along, running from a dark and tragic past, Alphonse begins to realize the feelings he has for you. But how could he possibly convince you to return the love?