It's common with adhd (which I tuink I have)
Because a brain of a person who has adhd is always stimulated, caffeine overstimuates it(can't stimulate an already stimulated brainzl), and they get sleepy
Bro I'm literally gonna get a diagnosis for adhd soon because I show symptoms of it and I didn't know that 😠could be because I never drink coffee
Milk used to make me extremely tired back then though but now it doesn't if so that counts
Milk doesn't have caffeine in it silly
Yeah not drinking coffee/or just.. any type of caffeine and getting tired is somewhat od a sign of adhd,, it's not like a definite thing but it's a possibility