Also add Harlan Ellison -- multi-award-winning American fantasist, author of "'Repent Harlequin! Said The Tick Tock Man" and "I Have No Mouth and I Must Scream" -- who, when younger, liked to ocassionally write while starkers. One instance of such behavior --writing "Pretty Maggie Moneyeyes" while sitting naked in a Las Vegas Hotel room -- resulted in his contracting pneumonia as a result! He's still around, still writing, and was recently nominated for the Nobel Prize for literature.