I too have experienced this sensation my whole life under such situations. In fact, one of my favorite things to do in life is go for a 6-7 mile run, come home and lift weight for an hour or two... then... wait until I'm hungry (usually about 45 min) and eat an insane amount of food. The food tastes 10x better, and the sensation when eating it is pure bliss.
Always have felt great doing that, and I'm really skinny. We clearly don't have any idea why some people can do that, and others cant. It's probably not until we understand that difference that we'll have any sense what metabolically is happening.
This stuck out for me. Especially interesting that taste & eating sensation are both heightened.
When I haven't eaten in a while and know food isn't coming, I don't really feel hungry, I just feel tired.
"hunger" is a simple word for a pretty complex mix of biological, psychological, and environmental factors.
Someone here or on reddit once had a problem with their mind keeping them up for either hunger or to check their phone or something, and they started doing pushups every time it happened, and some part of the brain learned the association and cut it out. I never did that but it might be worth trying.
Apparently some people don't have this problem, which makes me incredibly envious (or would if I could feel anything).
It's this nagging thought of "JESUS CHRIST YOU'RE GONNA DIE IF YOU DON'T EAT A LOT RIGHT NOW!"
I've experienced it after hard days at work (construction), multi hour lifting, cycling 50km. Same shit every time. Surprisingly, unlike what my dumbass brain says, I don't die if I eat only a little and just go to sleep.
Counting calories didn't work btw. It actually made it worse as my primitive brain would know it's "starving".