Have you ever been to a naked beach? A must try for everyone.
In Thailand it is illegal to be naked in public. You can get deported for this. I have heard a story about a couple swimming naked in a river in Pai, who got deported for this.
There is, however, a naked beach in Koh Phangan where you can be naked! I am not sure how legal it is, but the beach is chill, and everyone just suntans naked, swims naked and no one feels awkward.