Of course, you're fueling the waking state with these stimulants, and then, of course, it gets to 11 o'clock at night, and the brain says to itself, "Actually, I need to be asleep fairly shortly.
E, claro, alimentamos a vigília com estes estimulantes. E depois, claro, chegam as 11h da noite e o cérebro diz para si próprio: "Ah, preciso urgentemente de dormir."