Over at CNN there is an excellent article on dismantling the clean image of Jesus. Literally speaking, Jesus was dirty. He suffered human problems, which could include things such as dysentery.
One paragraph reads:
To that end, I suggested recently to several astounded colleagues of mine that Jesus actually had to go to the bathroom, perhaps even on the side of the road between Capernaum and Jerusalem.
Although true, this instantly reminded me that some early Gnostics (Valentinus) thought Jesus did not go to the bathroom:
He was continent, enduring all things. Jesus digested divinity; he ate and drank in a special way, without excreting his solids. He had such a great capacity for continence that the nourishment within him was not corrupted, for he did not experience corruption.