I agree with 'brad_3128', lying isn't limited to one gender. Being able to discern a lie definitely comes down to the person's personality, morals etc. and, to be honest, logically, you need to work out whether what they are saying makes sense. Another thing to watch of for, for example, is: if someone tells you that you are beautiful.. I used to assume that meant whoever was saying it was elaborating on the truth or flat out lying, but that was to do me and my insecurities, not them.