Why do ladies cheat?

Please my name is agali, I want to know why ladies cheat on guys,even when you show caring and you tell her the truth.

some woman are looking for a man to be caring and honest and others are looking for a man to be mean at times but still show her that he cares for her. maybe you should just try to treat a woman caring but show that you mean business other times. (not all woman love the romance type)