Pre-Disposed for Polyamory?

[sygma]

I'll admit I didn't even know polyamory existed until a few weeks ago. It was sort of a relief because I feel pre-disposed to love more than one man at a time (even in second grade when I had a crush on both Jonathan and James). Since it isn't in our culture to be polyamory, I developed a sharp self-hatred and an internal mantra, "I am a terrible person."

I am in a long-term, very loving, monogamous relationship but have had several affairs. I feel terrible about these affairs. I even considered sentencing myself to exile to pay for entering into them.

My question is: is polyamory something that people chose or do you feel that there is a predisposition that is a little out of our control?