Checking into the hotel in Bangkok as a single man, they just assumed I was there for sex, and asked if I wanted a girl sent up to my room (the answer was no, in case you're wondering).
We also trekked through the "native tribes" areas in the north, where the tribes had been "persuaded" not to practice slash-and-burn agriculture anymore, and made a side income from hosting tourists. Believe it or not, one of the tribes was called the Karens.