Why Do Men Cheat?

Will all the honest men please call or blog us to give us the real truth about why men cheat. Can a man really love a woman and still cheat on her? Why do men cheat when they have the "everything woman" at home. Is there anything a woman can do to keep her man from cheating? Why do men expect women to stay with them through infidelity but cannot do the same? Are the ramifications different if you cheat in a marriage as opposed to in a dating relationship? Should you try harder to salvage a marriage after infidelity?