Trivially, King Louis XIV of France only took a total of three baths during his 77-year lifetime. The three times were:
  1. When he was baptized
  2. When a mistress insisted
  3. When a doctor lanced a boil on his tush and ordered him to soak in a tub filled with water

From AtTheCrossroads, Daily Trivia Question (April 15, 2001): http://www.atthecrossroads.com