Is an open relationship right for you?

What do you do when your relationship becomes too open? Is there a way to gracefully close it? When the novelty of it wears off and one of you is not feeling as enthusiastic about it as the other, how do you regroup and put an end to it?
Because I like to patronise you (just kidding), here is a brief description of what an open relationship is. Simply put, it means both partners agree for one or both of them to have sexual relations with people outside their dynamic but still maintain commitment to each other.
I support the freedom and independence of all forms of relationships and whatever shape people create for their own personal dynamics. I also remind you that I am not a relationship expert but simply here to share my opinion. That being said, I will say open relationships fascinate me and not in the best way, I cannot for the life of me understand why someone would subject themselves to such torture. 
If you feel like you cannot get all that you desire from your main squeeze, if you are insatiable to the point where it is too much for one person to handle and you would rather enjoy the company of multiple sexual partners, then why get into a relationship at all?
Recently, in one of the many television shows I pay close attention to, a married couple that has previously been open came to a crossroads when the wife wanted to put an end to the openness and become mutually exclusive. It did not present a major issue between the two as the husband seemingly agreed to close the relationship.
It did make me ponder, however, what exit clause is in place for when the situation gets uncomfortable or too open for one’s liking?
Dependent on what is being practiced, open relationships open you up to more than just sex with people that are not your partner. If safe practices are not being adhered to, it opens you up to potentially contracting STDs. There is also the emotional aspect of things that largely goes undiscussed. Sometimes while you open yourself up to developing feelings for other people, what happens then? Does your primary relationship end? What if there is a pregnancy? How do you navigate jealousy from your primary partner?
All these questions just make me think it is more complicated than it is easy or fun, which begs the question why do it at all? Wouldn’t life be much simpler if you remained single and casually enjoyed the company of whoever you pleased and whenever?
If you have to open up your relationship, then are you getting what you desire from the relationship? Aren’t you just going through the motions out of habit if you have the need to enjoy the company of someone else?
Some people credit being open as to why their relationship has thrived. I vehemently disagree with that notion. It is seemingly thriving, but incredibly hollow. You both go out and enjoy the company of other people and only meet back up to go through the other aspects of life together, physically available to each other but emotionally absent.
Save yourself the trouble, closing a relationship would be contentious. If you cannot commit exclusively to one person (this goes for infidelity too) remain single and go about your business. No one will judge or chastise you for it.

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