In reading your answers, I came to the conclusion that mine is yes and no. I'll clarify.
Firstly, there was a epiphany of sorts for me 3 years ago when I realised that I don't feel any jealousy of my husband. Back then I was thinking about sex, but have been consistent with other aspects of relationships as well when I have come to think of them.
The other way around there was no epiphany, when it comes to being able to love multiple people at the same time. In this regard I feel similarly as I do with my bi-sexuality. Without thinking about it I just assumed that nobody has any limits in terms of gender of how many loves there can be. It has actually been interesting to find out that there are people "wired for mono" in that even if they question the social norm they still only can love on person at a time.