why do people cheat on their partners?

There may be many reasons,may they want do something they want but their partners do not agree,or may be some intrest.

because their stingy. they want their cake and to eat it too. they are probally confused with what they want too not knowing and knowing they are hurting somebody and even theirselves. im not real sure about why but some of this may help you. some people do it beacuse they know or think they can get away with it. their bored, or just a mean person who just dont care. some men cheat cause of fantasy, they fantasize about certain women they want or how they want them and they try to satisfy that want. in a relationship they got what they need but think they dont have what they want. confusen

i think it's because of human's craving for satisfaction. A craving for something that's missing in their relationship. the tendency is to look for that missing thing and they usually find it on others. And so, to satisfy them, they cheat. Others do it for revenge.