haha, i like the fun fact idea... but make it a little more "fun". i know it was probably an example, but some people might get the wrong idea. sounds insulting right? as if the girl didnt kno what clouds were. the point is, you want to give a fact that she probably doesnt know, but you also dont want to go over scientific on her. the trend i've noticed is that girls almost always say that the guy has to have humor. therefore, its not just brains you want... but its wit. alot of people are born with it, but there are ways of developing it. it's very useful when talking to a girl.