The title says it all but for those of you who want a bit more context as to why I'm asking this question, it seems as if a majority of questions involving women in this subreddit are all about dudes who unknowingly have oneitis or are asking about a specific situation involving their LTR.

In my personal opinion, spinning plates or having multiple FWBs is much less stressful and rewarding than worrying about what one particular woman is doing. I don't see the benefit of having to constantly look for red flags to see if your girl is cheating or is about to monkey-branch or something.

So for those of you in LTRs; why? What have you gained from being in a committed relationship? Why not spin plates or keep it casual? I'm genuinely curious and don't quite understand it.