for many reasons today.
I'm mad at this girl at work; she grew up in a rough life style and is confused about who she is. So what she is doing, through influence from our work environment from other girls; is changing who she is. Trying to become 'busty', 'sexy' among other things. She can lie to everyone else, but not herself.
SCIENCE!!! When you try to make superheroes conform to the laws of physics well guess what? Your variety goes wayy down. Many of the superheroes we have aren't even possible when your manipulating natural laws of nature to your advantage.
Example that makes me upset: http://www.comicvine.com/forums/off-topic/5/real-science-makes-comics-a-drag/751049/