It's very tempting when you really want to be with someone to settle for much, much less - even a vague pathetic facsimile of less - than you would have ever imagined. Remember always what you set out to get, and please don't settle for less. These guys exist because there are a lot of women out there who allow them to.
"He's Just Not That Into You: The No-Excuses Truth to Understanding Guys". Book by Greg Behrendt and Liz Tuccillo, November 2004.