[I'm on board with literally everyone who called it bitter tbqh]

Some. . . commercial drinks are meant to be more like desserts. [they are abominations to the coffee name and he wants to say as much, but no. he will be nice to Yingying] And it is a stimulant. The coffee bean has a substance called caffeine in it, which affects the human body by. . .

. . . speeding it up?

[least scientific description of caffeine ever]