LOL, I learned that for most (though not all) people, being unaffected by rough seas is a highly relative classification!
Like being tortured-eventually, nearly EVERYONE (though not everyone) “spills the beans”!
I’ve been lucky in that regard; on our first saltwater trip one of my friends was telling me how sick I’d be (while we were drinking the night before) and yet he was the only one of us to get sick...