I was explaining this to my daughter in quite simplified terms the other day- we evolved to taste sugar and enjoy it because finding a sweet edible plant meant we had a source of energy to help us hunt that day. Pretty useful if you’re a hunter-gatherer.
So we seek out sugar. Now we can get it whenever we want it, in much more massive quantities than we are supposed to be processing. Most of us are addicted. I’m not an exception.
There’s a bit of a sugar replacement movement, which isn’t necessarily healthier. Most of the sugar replacements have been linked with stuff like dementia if consumed regularly for a long period. And most of them taste a bit off. The other part of the problem is that when you eat something sweet, your body expects sugar. When it doesn’t get the sugar it’s expecting, it will feel like you are still hungry even though you just ate something.