This would mean that default language all people are born with is Physical touch, only later when all that baggage falls on our true selves, that first need morphs to whatever. Kind of what the G said that other centres are under influence of a sex centre.
In the context of romance novels, there were numerous examples of men and women who implemented various disguises to mask deeper issues and traumas, and that was reflected in their relationship and their love making.
I was kind of convinced that it would be easier if a couple had the same or similar LL, but now I´m questioning if that´s even a thing, or perhaps better way to put it: does it even matter? In the romances, once the couple is free of his/hers traumas, programming, beliefs, etc - it all falls into place and is reflected in their sex life.
It's an interesting musing, Mari
I think touch is very important to all human beings because of the many reasons some of you have posted above already, like it being our first and foremost way of interacting with the environment and attaching to our primary caregivers. I read recently something about how even our sight takes time to develop when we are babies and how that is also a reason why touch is so important for attachment, and also how attachment is like a basic need for babies. Some of you have mentioned already how babies don't survive without attachment, so, there's that.
But, regarding your question about love languages, I think that it's definitively due in great part to past experiences, trauma, etc., but also in great part to temperament (which is usually understood as qualities and features that a person brings to this world before developing their personality, so, perhaps, genetic?). So I guess it is similar to the attachment styles and what the Cs said about it being 60 percent genetic inheritance and only 40 percent nurture (which, by the way, goes against what most people believe about attachment styles, which makes it even more interesting

)
For me, it is very interesting because, even though some features may be greatly influenced by our genes, you can see many differences among brothers and sisters, and that is not only in temperament but also in attachment styles, and I would dare say love languages too. For instance, among siblings, the temperament of one child may be completely different to another, which creates different dynamics between the primary care givers and each child. So, siblings may be very different people with different attachment styles and love languages, even though they have similar genes, same parents, and very similar upbringing. And I think this the case for many siblings around the world, if not most. Then there is also the fact of the circumstances surrounding the birth and early months of each child and how that impacted development, etc. And then, that genes may manifest differently even among family members and also the idea the the soul can influence how these genes manifest, past lives, etc. So, in the end, I think there are lots of things combined that forge a particular individual.
So, to your question, do the love languages really matter? I guess it depends. I'd say that for the most part yes, but not so much that it is a rule of thumb that needs to be followed as dogma. I think that demanding that your partner should learn your love language, for example, wouldn't be conducive to a loving relationship, and unfortunately this is something that you can see people doing around this "love languages" topic. I think what matters about it is that it is a process of discovering the other person and learning about them, learning to love them as they want to be loved. Yes, in a romantic relationship, most people would appreciate physical touch because we are hardwired for it, but, I think that on top of that, some people may like words of appreciation more than others, while others may like thoughtfulness from their partner more, and another may like gifts more. So, apart from physical intimacy, lovers discover each other and learn to build their psychological intimacy this way. Even the fact that a particular love language is related to past experiences is also a window for discovery. It can spark a lover's curiosity about the other person, to learn about how they didn't have a lot of words of appreciation when they were little and that perhaps that's why they need it a bit more from their partner, or how they were neglected and now they don't want to feel neglected, etc. Yes, these might be wounds that need to be healed, and once they heal the love language may change or become less important, but, my point is that perhaps these love languages are just a way in which we can discover the other person more, understand them more, and love them more in the process.
Last but not least, for many people, it is important to develop that emotional and psychological intimacy before being able to fully open themselves to physical intimacy. I know that's not usually what happens in these romance novels, but what you do see in these stories is that usually there is some sort of emotional intimacy that needs to happen by the way of discovering each other and understanding each other so that there is real love. Usually there is physical intimacy between the characters but they feel somewhat disconnected until they finally understand each other and they continue to have physical intimacy but they are now fully connected and open to loving each other, so to say.