Eliot Spitzer, Anthony Weiner and other horndog pols are making it easier for the average Joe to have an affair, an infidelity guru says.

“If society is willing to forgive them, if his spouse is willing to forgive him, it gives greater license to men and women who think, ‘Maybe I, too, can get something on the side,’ ” said Noel Biderman, CEO of AshleyMadison.com.