Certain men are naturally devoted and others are tempted to varying degrees, with opportunity often a factor, to cheat. In between are those who swing either way based on the strength of their relationship and attracrion.
No one answer for all.
“... certain men are naturally devoted...”
I disagree. Devotion is a trait you pick or become.. it isn’t something natural like being born with blue eyes or brown hair. I say it is a choice for both sexes. My husband has stayed true to me and honored his vows (when I know he has probably been offered otherwise) and I have done the same ( and yes.. women get offers as well). The answer for it all is this.. why did you marry and do you want to stay married? (’you” being everyone not you in particular).