Chimps in social group are, on the surface, loyal to each other sexually, but when a stray male sneaks up to a strange group and manages to catch a female's eye, she will usually stroll non-challantly behind a bush in the male's direction (as if looking for berries) and offer herself for a 5-second copulation, hopefully without the knowledge of the jealous males in the group. The scholarly TV voice-over intoned that infusion of fresh DNA is important for the genetic health of the group.
Hmmmm...says I; behavioral nature usually follows the needs of genetics; maybe female infidelity is ingrained!
Then I see a report that researchers have determined that most male sperm (as opposed to the other kind) are programmed not to find and penetrate the egg, but rather to carry on a 'rear-guard' defense against the sperm of a different individual (presumably arriving right after the first guys!!) allowing the remaining 'assault-sperm" to carry on without competition.
If female infidelity is natural to the point that our sperm have been programmed to deal with it then it seems likely that women cheat as much as men.
Personally, if my wife of 19 years has been unfaithful I don't wan't to know about it. I very much don't want to know about it!
Some will come and tell you they cheated on you 10 years ago only to hurt you. They will claim it is out of honesty, but had they been honest they would have told you right away. Now they will cry and tell you you have been had, and that they are honest about it. Ah! What a trip.
I understand you 100%. Its bad enough they cheat on you, you certainly do not want them to tell you're an idiot who has been had and who cannot expect to be taken care of in the olden years.