Only 11% of primates on this earth are monogamous. That's it. So where this idea of being monogamous comes from......well for me, I think it's driven my man made religious ideas & ultimately about control!
We are all sexual beings & there's absolutely nothing wrong with exploring that! There should be no guilt; problem is society will make you feel that way. Guaranteed!

It's hard to go against society, but you are in control of your wants & desires & like stated above, keep that message in the forefront of all conversations.