"So, you're interested in these?" The old man serving in the shop asked you shaking a little red box in his hand, "these are shrinking pills, and as the name suggests, obviously shrinks the people who swallow them, if you're already shrinked don't worry, you can't shrink more by swallowing more than one, but you should be worried if you don't have one of these", the old man took out another little box with the difference that it was blue, "these are growing pills for the people who has shrunk, but also for the people who wants to be bigger, I can't tell you if there's a limit size for these ones".
"But if you don't mind" he adds, "there are people who like to stay small, is like a fetish or something, the same with people who wants to stay big".
"You know what, I liked you, so I won't have any problem giving these two for free" he gives you both shrinking and growing pills, "but I don't mind if you tell me about you or why you want that".