DH has always wanted to go on a cruise and we have booked a March Mediterranean cruise for his big birthday next year, going with P & O. Any hints and tips from experienced cruisers? Just me and him, kids are home with the grandparents. I’m not a huge fan of boats, any advice re travel sickness prevention? And how posh does the black tie outfit need to be (there are 2 black tie evenings). I’m presuming Mediterranean March weather will mean we won’t be using the pool. Thanks for any advice 