Primates, grooming each other.
In my experience, the desire to cuddle, once fulfilled, is quickly amplified and changed into other urges. That's how the species perpetuates itself.
Sorry, I could not cuddle without an erection.
LOL! Although. . . I think even primates keep it in the 'family'.
Why don't these people just play Monopoly together? Oh, right. .. it takes too long.
Isn't there some kind of 'physics' here. . .something that compares say. . .to heating up water in your micro-wave vs on the stove. . .the water placed in microwave is 'hot' for the time it took to heat it up. So the water heated on the stove; stays hot - longer. (So, if you use 'instant coffee'; and like it hot. . .longer; do not use microwave)
Anyway; think this surely - somehow - applies to those supposedly 'instantly necessary' warm fuzzies. . .
Warm cuddles that pass for 'unconditional love'; I think, by any calculation; must get cold, quickly.
I happen to like having insect parasites removed from my pelt! And they're a good source of protein!