I'm almost tired of defending these cruises though. Certainly, if you want to find easy sex, it's not much work. But this idea that every square millimeter of the boats surface is covered in copulating guys or left over semen is just bonkers. You can go the entire trip without seeing any "public" sex (and I don't mean staying in your cabin either).
In short, if you want to have fun with casual sex, great -- it will be pretty easy to do.
If you don't want that, then you're not likely going to see it and you'll have a great time too.
Either way, the sense of being able to be totally yourself for an entire week in a great, positive, fun environment is something you should not pass up. It's really an experience and unless your get sea sick, it's almost always a good time
I was on one about 3 years ago and it was a blast. Everyone I know who went was in a mild depressive state the week after the cruise when back in the "real" world again. I'm really looking forward to next month!!