Lots of shipmances happen on board. In the middle of our whale watching in PV on the Panorama, I witnessed a guy go off on 2 other people, I didn’t even know he knew. Apparently, they were a work group of 8, on the cruise, and the 2 had disowned another younger co-worker who was “getting around” on the cruise ship. This was only day 3. I saw the younger girl a few more times during the cruise with a few different guys at different ship bars.
It’s not my things, but I think it happens a lot just like on land. You gotta be careful especially with that extra element of the ocean looming below. I’ve had a lot to drink at sea, but never where I was even close to “falling” off the ship.