Woman diver posing

10) He keeps staring at himself in your mask.

9) You find him buddy-breathing with a grouper.

8) He pees in his dry suit.

7) He doesn't pee in his wetsuit.

6) After you surface, he keeps trying to buddy-breathe through your snorkel.

5) She keeps giving her octopus to an octopus.

4) He pulls off your fin and tries to breathe off your big toe.

3) His mask fogs under water, and he spits in it.

2) Your mask fogs under water, and he spits in it.

1) He looks at you cross-eyed and slurs his bubbles.

Diver photo by Shutterstock.com