It's been brought to my attention a lot lately, and I wonder if others do it, too.
When I look at someone's artwork, I automatically make a silent judgment on the artists' sex. Sometimes I'm surprised to find out a man did a certain work, and visa-versa. I also do it when I read something that I haven't looked at the writer's name before reading. Once, I spoke with someone on a forum for months thinking she was a man. When I made a reference to her as 'him' she blasted me for not knowing by then and I was sorely embarrassed.
I can understand what you mean. In certain media it can be very difficult to know the gender of the person with whom you're dealing.
Having been on the receiving end of such confusion-face to face-(because my mother forced me to have short hair as a child, and my real name is sort of...gender neutral), I know how hurtful it can be and I try to be very careful about my assumptions.
However, now that I've grown up, and there is no mistake that I am all woman (at least in person), I look back and understand how easy it might have been to confuse me for a little boy, and I try to be forgiving when people make the mistake.
I guess we just all need to try to see as much of others people's sides of things as we can, be honest when we make mistakes, and do the best we kind to be kind and understanding.
Well here it can be tricky to say the least. LOL I have made that mistake a few times. I am more cautious now and still am wary of some of those I read and commune with. Still it is a fun place to be. I'm a girl by the way.