Okay, okay. Pyrrha can be serious, and treat this seriously. It helps that now she does feel a little bad. Gideon doesn't seem upset to have been laughed at, which helps, but she was asking a sincere question. Pyrrha can't undo her reaction, but she can at least offer a sincere answer to the second sincere question.

"It's something that grows on certain types of plant."

Hopefully she won't need to explain plants, though she's aware that she might.

"Almost all of them are sweet, and many of them can also be sour or bitter. Pineapples in particular are mostly sweet and a little sour."