If you've ever thrown some stuff in a bag instead of carefully packing for a trip, you know how easy it is to forget essential items like, say, a bathing suit. While many people would go and buy a new one, others would just make do with underwear or other items they brought.

Yesterday, we found out which type of person Justin Bieber is.

The underwear one, obviously!!!! Justin shared two photos of himself enjoying some water sports in nothing but an unbuckled life jacket and some white Calvin Klein briefs. While this is far from the first time we've seen JB in CK underwear, it's been a while, and we are thankful for the reminder.

Now if someone could just remind him to always forget a bathing suit, that'd be great.