According to latest stats: India-49% of men are actively seeking or indulging in extra-marital affairs. Women don't lag much behind. Pakistan-7% of men are actively seeking or indulging in extra-marital affairs (they are the next highest offender!) Egypt-6% of men are actively seeking or indulging in extra-marital affairs Saudi Arabia-5% of men are actively seeking or indulging in extra-marital affairs In India too, Hindu couples are the highest on the infidelity index, Indian Muslims being on the lowest in India, apparently that's one bad thing they have not assimilated themselves yet into, but that's a different discussion. Thanks to Islam which puts even heavier legal penalties on illicit affairs between married couple, while the legal penalties of non-married illicit affairs being already very strong and in most cases deterring.