Love and Similarity(some thoughts from the movie 'Lobster')

Should love be along with similarity?
The film made an absurd settlement that all couples tend to prove their love by the similarities between each other. The basement of the assumption seems that the couple will be more suitable in the same trait. In some degree, the statement makes sense. There's always stories behind a trait. By sharing the experience, the couple would have a better understanding. Thereby, there would be less chance for them to have conflict with.
However, the above analysis, which we agree with in our daily life, has several deflects. That's what the film showed to us.
All of the facial accordance just shows how a person suit to another. It does not reflect the essential part of love, the underlying accordance, a line connecting their heart. For love is that of a metaphysic thing, we cannot see it in an analitical way. It can only be felt in our deep inside. thus, all of the accordance we've found with our lovers are not why we fall in love with them, but the effect of love-- we are trying to realize the love.
We won't be pleasant or satisfied by pretending as somebody else. The limp guy, for example,