Why? Because we’re told we’re not “allowed” to get mad or be suspicious yet: he’s not our boyfriend yet. This has led many women to believe that behavior pre-relationship is not indicative of what a man’s behavior will be post-commitment – as if he just transforms into a new man once he takes on the title of “boyfriend.” Yeah right. Here are early signs a guy will cheat, way before he even has the chance. And yes, you should look for them.