what is that song "ego" really about??

is it about k. west "ego" ( his man part) cuz they say: stroke my big ego and then beyonce says its to BIG , and WIDE , and it willnt FIT also in the video she spreads her legs almost every time they are saying that part so is it about a man's u know what of about her ego ??

ps DO NOT become my fan I don't care if u like me !!! and if u do I will crash ur computer !!!!! >:|