I find it interesting that some people are strictly monogamous while others are on the complete opposite end of the spectrum and prefer exclusively non-monogamous arrangements. I respect all variations; I’m just curious about the influences behind them. Personally, I’m monogamous myself, but I’m okay with my husband being with other women as long as I don’t feel neglected and he’s discreet about it. I think this perspective has been influenced by my parents’ marriage.
Role models.
Parents, other relatives, people that you considered important during your whole youth.
Usually you watch them how they live their life and what important decisions they make for their life, and then you decide (consciously or unconsciously) to copy some of it in your own life.