Separated shortly after birth and raised in different countries, both twins scratched their heads with their ring finger and thought it was funny to sneak up on strangers and sneeze loudly. (Who doesn't?)
Both men loved butter and spicy food. Both flushed the toilet before and after using it. Both read the endings of books first. Both wrapped tape around pens and pencils to get a better grip. Both spoke at precisely the same rate, despite their different languages.
The debate goes on.