My position is for the proposition that one cannot be madly be in love with two persons simultaneously.

1. Mutually exclusive desires arising in such relationships will reveal the truth of who the person "madly loves".

The point assumes that the defining aspect of love is sacrifice but we are considering such in the romantic context. Being "madly in love with a person" in my eyes necessitates a true love and that entails the individual is willing to sacrifice all to be with that person and this includes foregoing pursuing any additional romantic interests which would undoubtedly include pleasing the desires of the latter romantic interest which could conflict with the interests of the former.

Take the scripture below to further clarify the point. Bear in mind it is not referring exclusively to romance but the principle of mutually exclusive interests can apply.

Matthew 6:24 KJVS
No man can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other. Ye cannot serve God and mammon.

Let's say one wants to settle down and start a family while the other wants the party lifestyle. The decision the person makes will reveal the one who they are truly madly in love with.

1. You only have one "all" to give.

This follows the preceding definition of love. If both partners were in front of a firing squad and you could only jump in front to save one sacrificing your life. This will prove the one you love madly.

I think one problem with my points is the word "madly" which is suggestive of being irrational. I think the phrase conveys loving someone tk a degree in which you do things that don't make sense. I was tempted to make an argument that sacrificing your life for your partner would go against our instincts and be counterintuitive to ine holding a purely secular or Darwinian understanding of man but the may not be the case.

It does make me wonder if males sacrificing themselves for their mates is a common thing in the animal kingdom. Perhaps, it is not and we definitely defy our instincts when we give our lives for our partner. It does seem to stand at odds with "survival of the fittest" so perhaps it is love that is able to cause us to suspend our cold survival instinct. If so, I think it is poetic that love is demonstrated to transcend rationality.