Recently I had a bad gastroenteritis (major vomit/diarrhea for two awful sessions, then three days with no appetite).
And I lost about five pounds. After I quit worrying about other people who might catch it (it was definitely contagious), I began to feel that for me it was worth it.
Even as I type, I know what the answer to the question is: This would be a stupid and harmful way to lose much more than five pounds.
Still, the question is, could you somehow arrange for this once in a while? Are there fashion models or wierd people that do it?