When you hear the words "nature festival," what do you think of? I think of trees. Tall good ones. However, enough people in the United Kingdom hear "nature festival" and think "nudists" that one such festival had to put out an APB on Facebook to set the record straight that clothing is not just encouraged, it is mandatory. You've got to assume a nature festival features a lot of moss-touching. (iStock) So if you were hoping to see some pasty English buttocks , look elsewhere. JASON DAY ASKED TO TONE DOWN MASTERS ATTIRE AFTER UNCONVENTIONAL CLOTHING CHOICE LAST YEAR The Cumbria Nature Festival runs from May 8 through May 10 and is set to include conservation groups, stands and activities, food , live music, and more. However, " nudity " does not fall under their definition of "more." "Cumbria Nature Festival is primarily aimed at NATURALISTS... not NATURISTS," their Facebook post reads.…