I've never been on a cruise. My wife and I were considering one for our honeymoon but my dad advised us not to because "all there is to do is lay on the deck and eat and drink".  Sounds like a fat person's dream come true. Come to think of it, of the maybe three or four people I know who have told me how much they enjoyed their cruise, they were all fat. I've never met a thin person who said "I can't wait until my next cruise trip".