I hope you are not eating but this is a piece of smegma, approximately 2"x1" that I removed from the end of poor Theoden's penis today. Apprarently it is quite common to find a bean shaped lump of smegma just inside the urethra of male horses which can cause a lot of discomfort. There is a brilliant thread on the Intelligent Horsemanship Discussion Group which explains in great detail how to clean a horse's sheath: http://ihdg.proboards.com/index.cgi?board=fame&action=display&thread=59795
