So, we know elves fear (souls basically) and hroa (body) are linked. Ex, if the elf is upset as hell their body just…degrades. That part is canon.
So, I think it would make sense that a sad, their body would require more sleeping, food, etc to sustain itself.
This takes stress-eating and breakup-icecream to the max. We know elves typically aren’t the biggest eaters in the world. But if an elf was very upset, they would just eat and eat and eat, sleep all the time, etc. Which leads to a few things.
1. To a smaller degree, emotion snacking is basically mandatory. “Fuck, I just failed a test. Aaaand I could go for like five hamburgers right now.”
2. This could also go for larger things. Just like human’s depression-nap system, a sad elf will just. Sleep. For weeks.
3. Perhaps it’s an elvish custom to hold huge feasts after times of sadness. Beloved town member just died? Thier funeral will have a shitload of food. Everyone will need it. Post-battle? Better start a huge potluck, shit, these elves need a lot to eat to keep up their souls now.
4. FOOD GIFT BASKETS ARE A MUST. Flowers? No one needs them. The real thing to do to cheer up your elf friend is send them several crates of protein bars.
5. Maedhros probably ate an absurdly huge amount, all the time. Even on top of how much he would eat being so tall. Invite this guy over for a buisness dinner? Better have an extra four portions for him.
6. “Elrond dude there’s like hundreds of chip bags scattered in your office” “I KNOW but i am WORRIED”
-“Perhaps it’s an elvish custom to hold huge feasts after times of sadness. “
Well, that would explain why Thranduil holds so many feasts in Mirkwood
oooooooooohhhhhhhhhhh shittttt