Once you get to thinking about engagement with someone, you’d probably want to cut it off with the other person(s). I don’t know, I’ve never been in a relationship but it seems to me that if it doesn’t work out and let’s face it, most probably don’t, that’s a lot of wasted time.
The time “wasted” is the honest price that you pay for any negotiations which fail in business. It is also a fair and natural price for any interpersonal relationship that does not work out.
Furthermore, if a person is not worth time investment to you, I do not see how that person could possibly count as a viable candidate for marriage.
Finally, as I have shown, having multiple relationships at the same time, does not prevent a single hour from being wasted.
One more thing before I end, we all know that polygamy is wrong. The Catechism says it’s contrary to natural law.
1645 “The unity of marriage, distinctly recognized by our Lord, is made clear in the equal personal dignity which must be accorded to man and wife in mutual and unreserved affection.” *Polygamy *is contrary to conjugal love which is undivided and exclusive.
1646 By its very nature conjugal love requires the inviolable fidelity of the spouses. This is the consequence of the gift of themselves which they make to each other. Love seeks to be definitive; it cannot be an arrangement “until further notice.” The “intimate union of marriage, as a mutual giving of two persons, and the good of the children, demand total fidelity from the spouses and require an unbreakable union between them.”
Needless to say, people who are not yet married, do not yet have a residual right to unreserved affection (however, promises and commitments are to be kept, therefore “cheating” on a boyfriend or girlfriend is a moral offence). HOWEVER, the affection which drives people to marry exists before marriage, not only after the wedding. People come to the wedding ceremony with a certain disposition towards each other. This is the, shall we say, pre-marital love, which is a certain stage in their interpersonal relationship. They feel that unreserved affection and they want to cement it with the sacrament. This is the natural course of events. Love between a man and a woman, of its nature, seeks to make itself unreserved, exclusive and permanent.
Therefore the only attempt at justifying premarital non-exclusive relationships can be that they are a transitory stage and they serve making up one’s mind about things. This argument I addressed above. I believe it conflicts with our dignity as human persons. I believe the transitory stage is no excuse because a transitory wrong is still a wrong and friendship is already sufficient for learning about a person and finding out whether he or she is honest, reliable, compatible with your character.
Furthermore, polygamy is not only about sex. The split affection is already unnatural and it is an arrangement that cannot hold. From here follows that even without sex, polygamous (polyamorous) relationships are contrary to nature. In my view, this makes them wrong because they conflict with the natural order of things.
What is even more, a person who enters into a romantic relationship giving it a fair chance of leading into marriage, does not accept any futilities. A person who enters into more than one relationship at the same time, accepts fully the futility of all of those relationships except one. This is because from the very start, out of all those relationships, all except one are doomed to fail.
As an illustration, if you have 5 girlfriends, you know from the beginning that 4 of those relationships are futile and - according to you - a waste of time.
If you spend that time in friendship, you do not build any relationships doomed to failure. You make friendships which will hopefully last. After a while, you pick one of those girls who appeals to you more than the others. If it works, it works. If it doesn’t work, you will have “wasted” some time (I don’t believe it’s truly wasted) but in a honest attempt to make it work - or with honest hopes that it will work. After a while, you try again. By the time you reach four, you will probably be engaged.
In this context, it must be pointed out that concurrent dating means that you “process” more people than in the traditional one attempt at a time scenario. And here I mean an honest attempt, not a random trial by error relationship. You “process” more failed relationships. That is in no way “healthier” than what is being called “serial monogamy” at the dating stage. What is more, it teaches the mind that human affection - and love - can be split between multiple people. Which is false because it cannot. In the end, those people will have to choose.
Therefore as in the original conclusion.