The Vikings called the side of their ship its board, and they placed the steering oar, the "star" on the right side of the ship, thus that side became known as the "star board." It's been that way ever since. And, because the oar was in the right side, the ship was tied to the dock at the left side. This was known as the loading side or "larboard". Later, it was decided that "larboard" and "starboard" were too similar, especially when trying to be heard over the roar of a heavy sea, so the phrase became the "side at which you tied up to in port" or the "port" side.

The vikings became confused, as they were mostly righthanded (starboarders) . . . Eventually, portsiders took up bowling, and became much, more proficient at the game, than the "starboarders".

All the righties had left, was the joy of watching the "lefthanded wonders" win at the game. In fact the term crying in "one's beer" became popular due to the lefty bowling influx and gerater proficiency. Of course most of the smart "starboarders", switched sides, as they realized it was not hard to do. We just throw it left of twenty.
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I like to watch . . . the ball that is.