When you visit your mom's and she made coffee

*sip*
What is this? Water? Why can't I feel the tingling of the caffeine fighting my fatigue?
*sip*
This can't be coffee, my vision is still not starting to blur!

Call me a sadist, an ass, or whatever. Coffee drinkers think they need the caffeine, but you'd be surprised how easily you can trick them. My dad got switched to decaf without his knowledge and went six months without a single complaint or notice. He even complimented how much better the coffee woke him up. The moment he learned it was decaf, he hated it and refused to drink it. Do with that as you will.

@Letmecode I've been lucky cause I get the opposite. Caffeine gives me headaches, I think clearer without it