the.com/eagerness

the dog that hears the leash jingle, living rent-free in your nervous system

means A keen, restless enthusiasm to do or have something — the feeling of leaning forward before you've even moved.

from From "eager," which arrived through Old French "aigre" (sharp, sour, keen) from Latin "acer" (sharp, pointed) — the same root that gives us "acrid" and "acute." So eagerness was once a kind of sharpness: an appetite with an edge to it, a hunger filed to a point. The "-ness" simply turns the keen-edged adjective into the state of being so.

etymology
from Latin acer, meaning sharp or keen
brain chemistry
dopamine spikes more for wanting than for getting
downside
overeager negotiators leave money on the table
linguistic cousin
shares roots with vinegar, both literally sour-sharp
for instance

puppy greeting behavior — dogs wag tails at 10+ tail beats per second when owners arrive home

black friday shopping lines — thousands camp overnight at best buy and walmart for early doorbusters

world cup ticket sales — 2022 qatar world cup saw 3 million ticket requests for 64 matches within first hour

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