Today, I realized that maths problems are the only place where someone can buy 60 watermelons and no one wonders why.
@ColinTheMathmo It's also the only place where you can buy 12*5 of the exact same type of watermelon at the same location and relative point in time, without complications
"I'd like 12 watermelons."
"OK, let me show you where they are."
"Oh, and 12 more."