The X-rated swinging symbol on cruises you might not know about — here’s how to spot it

For a long time, I’ve identified as a bougie boutique cruiser. I’m not sure why I had anything against big ships, I just didn’t get the appeal. Never did I think I could tolerate, let alone so enthusiastically enjoy, being on-board a moving vessel with more than 2,000 other humans. I couldn’t see the upsides to...