BEING AS OLD AS...

 Being old is not a curse but a natural development of the human body. Language, per usual, reflects our attitudes and even exaggerations about age, in comparisons, like David is as old as the hills (Adam, Methuselah, dirt, the earth, mountains, or the Pyramids, time. The Spanish language is not to be left behind, and it comes up with expressions like: Más viejo que Matusalén, que andar a pie, la tos, andar a gatas, Carracuca, Altamira, la sarna, el anuncio de la Casera, del año de la nana (de la polca, de Mariacastaña). The mysteries and hyperbole of language are to be taken with a grain of salt.