Case in point, last week:
Young Dude, with a mild viral illness: I don't have anything for fever. Can I get a prescription for tylenol so I don't have to pay for it?
Me: No, tylenol doesn't require a prescription. If you get the store brand acetaminophen, it's like two or three dollars a bottle.
YD: How the fuck do you know if I can pay for that or not?
Me: Uh, you have an iPhone X in your hand?
YD: Fuck you, lady, I'm outta here. If I get a fever again, I'll just come back here for more tylenol.