I guess there will always be this mono/poly debate and some will say they are 'wired' one way or the other etc. And maybe there's some reality to that - I honestly don't know. We have no means of pulling society and convention out of the equation to run that test.
But no matter..........
No matter what you believe I'm one who advocates 'learning'. I think everyone should have exposure and facts available to them when making important decisions in matters as important as love & relationships.
There are pros & cons to both models and one or the other is not the best fit for everyone. But I suggest you learn about both and not just accept what you have seen and been spoon fed from birth. Facts are powerful weapons against illusion.
Be in control of your own happiness.