In the spirit of Toyou, here are some random webfinds:
Mud video involving tickling (f/f):
http://www.messyfun.com/videos/descrip/mf-mw5.shtml
Selected pictures from above webpage (f/f):
http://www.messyfun.com/images/video_pics/m81v14.jpg
http://www.messyfun.com/images/video_pics/m81v10.jpg...