"If you rub your chopsticks too much they'll become sharp and you'll prick your mouth."
- "If you rub your chopsticks too much they'll become sharp and you'll prick your mouth."
"If you rub ~" 「〜をこすったら」
"your chopsticks" 「箸」・「あなたの箸」
"too much" 「余計に」
"they'll become sharp" 「トゲトゲでできて」
"you'll prick your mouth" 「口に刺さるよ」