Why do men lie to their girlfriends?

In response to my article my boyfriend is a liar, Leticia writes, "There are times when we don't want to accept the truth for so many reasons. We only see what is exactly in front of us. I don't know if it is the fear of being alone or you just get accustomed to being with that one person, with the hope that they love you enough to care about your feelings. But what I've come to realize is that if they don't care about themselves, how can they care about anyone else. I'm a strong believer that if men thought about these things being done to their mother, sister, daughter, they would think twice about some of the things they subject women to."