Coul you live on a cruise ship

I have come across a couple of people who spend their lives permanently cruising. They actually live on board and some pay a sort of rent to keep their suite. I couldn’t stand it, personally but I suppose you do meet a lot of different people from different countries. The main cruisers we come across are Aussies, Kiwis, Canadians, Americans and South Africans but not a lot of others except if you go over to Singapore where Chinese and Malaysian people like to cruise.