You've answered your own question, dude.
For those who aren't neurodivergent lack of sex, cuddling, kissing, etc. does make a person go from moody to volatile depending on how long they haven't done it and how's their libido. Some deal with it, others complain about it and get depressed.
While it's possible that I'm just uniquely adapted to this environment as you suggest, I doubt it. I know how good it feels to be warm. I just don't think that the warmth you're describing is only available through the romantic context that people in our society almost exclusively associate with it. Elevating sexuality above all other connections is one of the most deadly diseases of the contemporary mind.
I think that, phenomenologically, the basic elements of what we call "romantic" emotions are found in many different kinds of relationships (usually related in some sense to the creative process, but that's a discussion for another time). I've confused these emotions for "romantic" ones myself in the past, which is not uncommon among autistic men (and probably many normal ones these days). That or I'm a fruit, but again I doubt it. We're just trained to express those same emotions in different ways according to the appropriate context. Some people, though, are for some reason determined to remain slaves to sexuality.
C.S. Lewis has a great book called "The Four Loves", where (among other things) he distinguishes
philia from
eros. The former is capital "F" Friendship (or comraderie based on similarity of goal and soul), and the latter is best described as the desire to consume a person. He makes a big deal about the distinction, trying very hard to be clear that
philia is not gay and totally distinct from
eros. I think he goes too far. I think there's a place for the desire to consume another person outside of bonds between men and women; it just can't be consummated sexually. It's consummated through competition, collaboration, instruction, and in an absolutely physical sense (although all of the prior can contain physical components) things like religious rites where you consume the god or God; in other words, actually physically
consuming the living being of a person (as opposed to cannibalism, which is a death-oriented distortion).
Probably has something to do with women having sex as a method of intimacy whereas men do it for the same reason they're thirsty, hungry, need to sleep, need to take a shit or fart: Because we feel like it. Purely biological need.
Sex is a shortcut to intimacy for a lot of people, but I do wonder if women are more reliant on it. Maybe for them it's just an easier habit to get into because of the abundant supply.