It may take time to expose this person but thankfully, the telltale signs are inevitable squirming, failure to make eye contact, inability to recall past events. Often this person may initially have good intentions but somehow always exits in mid-flight, leaving you to land without a copilot. These people are not bad. When asked this question, several students cited convenience, excitement and peer pressure as their main reasons. Excitement is what most of us want in our lives.
Some people believe that lying is the way to get it.
I found this attitude to be equally prevalent among some of my female classmates. Enlightening conversation requires intelligence and sophistication at the very least. Some people lie to fit in. They figure that since everyone else is doing it they might as well. It is obvious that doing what everyone else is doing can be unwise and sometimes dangerous.