You mean <em>"Why do [some] </em><em>people</em><em> cheat in relationships?"</em>
Well an analysis revealed eight key reasons: anger, self-esteem, lack of love, low commitment, need for variety, neglect, sexual desire, and situation or circumstance.
<em>Or the world is and humans are just terrible LoL</em>
<span>allegorical fiction is basically fictional (fake) writing that conveys a specific, yet most often times hidden, message of symbolism, spiritual, and political (etc) nature.</span>