I think it would be less common if people accepted that monogamy is not the norm. Just be honest with yourself and your partner(s). If you want a monogamous relationship - commit to it. If not - don’t start one. I found out that I am polyamorous the hard way by thinking I am some kind of monster because I couldn’t just be with one partner. I did not cheat but kind of always had other love interests. Fortunately, my partner of 20+ years now was able to accept this as part of me. And now there is no risk of cheating for either of us because we can just be honest if there is someone else. It doesn’t change my love for him, it even made our bond stronger because it needs even more loyalty and acceptance of the needs of your partner to let them be.
I think it would be less common if people accepted that monogamy is not the norm. Just be honest with yourself and your partner(s). If you want a monogamous relationship - commit to it. If not - don’t start one. I found out that I am polyamorous the hard way by thinking I am some kind of monster because I couldn’t just be with one partner. I did not cheat but kind of always had other love interests. Fortunately, my partner of 20+ years now was able to accept this as part of me. And now there is no risk of cheating for either of us because we can just be honest if there is someone else. It doesn’t change my love for him, it even made our bond stronger because it needs even more loyalty and acceptance of the needs of your partner to let them be.