Professor Craig Morris, of Binghamton University in New York, said more women than men claimed to be 'better off' after they were cheated on.
He added: "Women report that they are more attuned to cues of infidelity, dishonesty, and other "low mate value" signals following having their mate "poached" by another woman.
"Our thesis is that the woman who "loses" her mate to another woman will go through a period of grief and betrayal, but come out of the experience with higher mating intelligence that allows her to better detect cues in future mates that may indicate low mate value."
Hence, in the long term she "wins".
'The "other woman", conversely, is now in a relationship with a partner who has a demonstrated history of deception. Thus, in the long term she "loses".'