When the topic of deal breakers come up I often see male posters commenting that women will always make an exception for the right guy. ie: she says she doesn't like older men but hooked up with an older man once because he was special.

What are the deal breakers you NEVER make an exception for? What are the things you just can't accept?

Examples: men who are significantly older, short, broke, small dick

Extra points if you can give a reasoning for those deal breaks that goes beyond just thinking they're unattractive.