I wasn't being frank, blunt or honest? Really? Perhaps you should familiarize yourself with those adjectives because I "was all of those."
Learning to swim is good exercise if nothing else and the fact that the Earth is 70 % water is just that, a fact. You don't find those statements fitting to any of those adjectives? Really?
I was legitimately providing advice. Seriously.
I'm not trying to make fun of the guy. I'm trying to give him an objective perspective which will hopefully allow him to enjoy cruises much more.