Truly, adultery is a thing of the heart, but it can also be influenced by society and culture.
It is also true that it is fairly common among men, but in recent times, women have been jostling to overtake men in this regard.

You see, men are natural adulterers because it has been hardcoded into our natural system not be contented with one thing especially when it comes to sex (or so I believe).
It then bores down to each and every man to control his urge, desist from other women and be faithful to their partners.