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>
I rate it a 9, you have some real talent! Keep working hard and you will for sure be going places!
B) Because they generally feature quicker cutting than modern films.