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>
Light,
Le Corbusier was a Swiss-French architect and urban planner who was a huge influencer in the evolution of what is now called the modern style of architecture.