Rapmon: because he broke something again, and he knows he's fucked up

Jin: because somebody complimented him

Jhope: Giggle? No....no fun... Jhope prefers laughing so loud at your ears that your eardrums explodes inside

Suga: because he's dreaming perhaps? *coughs* Yoonmin~

Taehyung: because there was a kid / baby around

Jimin: because he giggles every fucking single time

Jungkook: because somebody's hurt