An hour into the excursion, having visited several bars, the youngest of the sailors feels an urgent need to relieve himself. Telling his companions he'll catch up with them, he hurries into a nearby men's room...
As he's doing up the fly of his white shorts, his mouth start to tingle. His lips feel leathery; his teeth seem bigger. Rushing to the sink, he looks in the mirror.
"Huh?!" His lips have darkened, and when he parts them he gasps. His teeth! What the hell's happened to them?!! They're huge, yellow and prominent, like those of a... a... DONKEY!