We all know adultery is cheating on your wife but just because you want romance and go through the ceremony and waste money on a diamond ring is no indicator of true matrimony. Only true matrimony demonstrates true love. You cannot commit adultery in that state because love is perfection. So the people who only go through the ceremony without the true love are not even really married since that happens in the heart and soul, not through romance which requires reciprocation. So adultery does not really exist because when you are truly married it cannot happen. All they are really doing after man's marriage ceremony is fornicating. Of course they also lied because people think they are truly married when they are just two people living together fornicating.