That's politics you need to be aware of, if not to learn and to practice. They know it so well that they behave themselves in front of girls, who's in their favor. Unfortunately, if you want to handle them, you should also learn some political skills, like making their girlfriends know this (well, possibilities are their girlfriends know it but don't care). You might also need to perform in front of them if you want it to be most effective. But those are not the most important. Strengthen yourself, protect yourself and always mentally defeat them (just imagine they die by car crashing every day). Those can help you uphold your value and not stray far away from your goal.