"If there is an alcohol or drug problem with no recovery in process, chances are you will be very hurt by the guy. If there is lying or a history of cheating, ditto. It there is extreme narcissism or raging behavior, ditto.  

For other problems, like cheapness, if you see that the guy is working on himself, you may want to tolerate him." 

Dr. Kirshner paints a pretty bleak picture for women who refuse to part ways with the louses in their lives. Heartbreak and disappointment will become the norm. The good news is that there are ways to break the cycle of boorish bad boys. For starters, date against type and give nice guys a chance. More than likely, you won't find him glued to a barstool. 

To get a copy of Dr. Kirshner's new book, click here.