I know it seems silly to wear jeans in the tropics, but....... some of us LOVE our jeans so much that we'll go to great lengths to enjoy wearing them. (Check out some of the message boards for/by jeans addicts!) And, as many here are already aware, Carnival's air conditioning works very very well most of the time, so it's not an issue of comfort in the dining room.
On deck, yes, it's a different story. There you'll find me in a speedo, or less. (another hot button fasion issue!)
I don't object too strenuously to wearing slacks for a couple of nights. Mine are just some Salvation Army store cheapos, but they're just so boring compared to the many different styles of JEANS. Yes, it's an obsession of mine, sorry!