Yes, but I think that kind of outlook, taking the time to notice more than the superficial aspects about the guy/girl takes maturity and a shift in perspective. Many people are not ready when they're very young, some even when they're aged, to be married. Western society doesn't necessitate marriage to gain status and wealth or repopulate the farm hands any longer, so if people have the choice, I'd prefer it if they didn't rush in and wait til maturity and experience have taken hold.

I think cheating also implies a state of immaturity. That's not an imperical statement, but, if you haven't the courage to communicate with your partner after breaking an agreement of fidelity or telling them about the desire for variety/new experiences/etc., then you haven't reached a state where you can shoulder the responsibilities of monogamy and the roller coaster of emotions it can take you on.