I rather suspect noego that you in fact have a rather considerable ego (larger than your penis?). I also suspect you're a man towards the older end of middle-age, and want to have relationships without responsibility. As others have said, go shagging around. Well, do that, but don't pretend you're doing anything special.
When small dependent children are in the picture, I'm not sure that "relationship anarchy" quite works. Sometimes couple have to grit their teeth and just get through that time.
Or mostly, as we read in this section of MN, the men decide they can't take the responsibility, and they just walk out.
As Kr1stina asks:
You know, like housework, taking MIL to her podiatrists appointment , remembering to buy a gift for nieces 18th, going to family funerals and other people's tedious work functions and taking the day off work to accompany your partner to a chemotherapy appointment or to have the cat PTS?
and as Wannabe comments:
I find it interesting that we never hear from the children of these relationships. Where they have grown up safe in the knowledge that mummy and daddy have lots of different uncles and aunties who come to stay or who they go and stay with, and everyone loves everyone and no relationships are sacred