It's an interesting thing, this Internet. I would dare say it's the closest we can get to an abstract, immaterial, mutable plane of existance. There are few, if any constants. Gender is meaningless - I am a man only in as much as you precieve me as such. Were I more feminine, and/or no designation were made, one could reasonably assume I were a woman. Similarly, age is insignificant - if anything at all, it is an arbitrary convention we place on eachother.
More than anywhere else, and Entity Online is nearly pure intellect. Your existance is as mutable as you allow it to be, and one can be taken only as what one presents. It's really quite fascinating if you think about it.