Serial monogamy is exactly that - serial monogamy. That wasn't really what I was referring to though. Instead, I'm referring to adultery and multiple partners, which is no form of monogamy.
So, have you told your life-partner about this? Are you actively seeking and hoping for a second partner that you would be willing to make a legal commitment to? I so, what's stopping you?
I asked because I wanted to see how many responses I would get from anone that was actually interested in this. I think it's not many, and those are more like fantasies.