I am a very, very fortunate person.  Through some twist of fate, it seems that a trip to the beach has, for the last few years, fallen on the week of my birthday.  So this year, again, I had the chance to celebrate the anniversary of my arrival on this little planet from a beach in Mexico. But this year was not by any imagination business as usual on our few days in the sun. This year, instead of sitting comfortably on my beach palapa bed  in the shade and watching the fun in the waves, I decided make a change.  I actually got in the water. Well, it wasn't really a decision -- not like deciding which book to…