Yes, there are nude beaches in Jamaica. In fact, my boyfriend and I went a few years ago to Jamaica, for a wedding, and stayed at Hedonism in Negril. Hedonism has a prude side and nude side. Even on the prude side you can go topless. Also, it is an all-inclusive-resort which means that all of your food, lodging, drinks (alcohol and non-alcohol) and water sports are included in one price. Plus they have a theme night every night (i.e. toga night, pajama night, 70's night, etc.) They only allow 18 year olds and up on that resort. I'm not sure if there are any other nude resorts other than the 2 Hedonisms (Hedo II and Hedo III). We had a very good time. Hope that helps.
Folks there is NOT an area of any Carnival ship for nude sunbathing. There are designated areas for topless, but not nude.
CarnivalSensation February 2015
Carnival Dream November 2015
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if you ever have the opportunity to cruise the Greek Islands they have nude beaches on Mykonos and everyone from the ship seems to be pretty "cool" with it and once people recognize you from the ship they show you a great amount of respect in terms of not gawking (yes even the men feel a sense of decorum)..however, there seems to be a certain "mystery" about European woman who are not on the ship...I think it's interesting how our different cultures view this topic
no nude sunbathing on the Celebration, but there is a top optional deck, and not everyone up there was topless.....we liked it because it wasn't very crowded, and a lot less busy than the other areas.....the waiters even got us drinks........