World's pettiest man. Well, I can certainly see that. I mean, you ARE the one woman in the world able to curse at the hero's face and live to tell the tale. What else? You've turned him on in more ways than one. 1st, plain ol' sex appeal, 2nd briefly outsmarting him, 3rd loud private cursing, 4th sadistically abusing a corrupt official, 5th and the most recent, seduction by touch/measuring.
So Ares is aware of the threat Lancelot poses to his potential love life! I love it! I love him but I can't blame anyone for falling with Lancelot, guy is THE most normal, sanest character so far.