One of my great joys in life is how much my daughter loves my stubble. She grabs my face with both her hands and declares “Sooooo scratchy!” and then squeals and laughs when I nuzzle her cheek with mine and pretend to be a horse. From ~3 yrs old, now going on 10.
My heart will definitely break a notch if the day ever comes she outgrows that!
I'm a guy, but I recall as a kid feeling my dad's stubble when I gave him a hug as a child, when he came home from work, smelling of sweat and tar (he worked as a road maintenance worker - a very hard job, especially in the summertime in California).
He passed away 14 years ago, and I'm turning 46 in a couple days; how time passes...
I can still smell that and the feel of the work denim he'd come home in.
I remember those things more often than I do the sight of his face, or the sound of his voice, or the smell of his cologne. By far.
Is it just my kids then that seem absolutely immune to cold water and will happily jump into unheated swimming pools, and will happily have a cold bath?
Now he's four years old, and a few weeks ago we swam together in a cold lake. He was happy to get in, but after ten minutes I noticed that his teeth were chattering and his lips were blue, while I was quite comfortable.
I don't think they really get a good idea until they are about a year in to puberty, and even then they're more prone to mismanage their clothing (but I think that's just experience).
Also worth bearing in mind that younger kids have higher body temperature, and that they usually have lower surface area:volume ratios than bigger people.
For example, going out in the cold doesn't hurt at first, but the pain builds up. As an adult, you may react to the initial no-pain sensation because you correctly predict you'll be freezing later.
Also consider that as an adult the same feeling can be both good or bad by mental context: consider a warm toilet seat -- warmed by a fancy Toto heater at home vs warmed by a stranger's buttocks in a fast food bathroom.
Maybe I was that way as a child as well, and just wasn’t introspective enough to notice.
As an adult, I do get cold eventually, though; I can’t stay in cold water for hours, like I could as a child.