Might have to go back further in time... maybe its from her childhood, maybe she was SHORT as a kid and grew up physically but still keptthat SHORT mentality. Maybe she played with strawberrySHORTcake to long. Maybe shes and tomboy and only wore SHORTs. The problem might be she has a SHORT temperment. I'm no MD, but its fun to speculate what drives her along with you. 

Quote from resinate:
I think Hawker nailed the practical piece which requires strict rules and discipline.
Now as to your psychology...... As some one who blew out my first trading account shorting in late 98, can I suggest looking at your psychology around authority and crowds.
Problems with your father?, distrust government? rebel against norms?, assume the mob is usually wrong?..... I have no idea what drives you, but what you describe sounds like an ongoing rebellion against something. Usually a smart stance IMHO but can be deadly trading as you have learned.
Whatever motivates it and should you continue to chose to indulge it, consider what someone said above about at least giving the mob its due respect and keeping very tight stops when you buck the trend.