SHEBOYGAN, WI (WHBL) - A Sheboygan man who was running naked on the northside of Sheboygan last week has been formally charged. 29 year old Ryan Gruenke has been charged with misdemeanor counts of sexual assault and lewd and lascivious behavior. Authorities said Gruenke was allegedly seen wearing a Speedo bathing suit when he encountered a female jogger on Broughton Drive about 11 o’clock on Wednesday. He then allegedly touched her left breast and ran off laughing, but then was later seen naked hiding behind some bushes. Authorities said Gruenke had a history of such behavior and when they contacted him Gruenke said he likes being naked and has done it up to 35 times this year. He’s facing up to 18 months in the county jail, if convicted.