Whenever I have a particularly good bowel movement I experience a marked feeling of tiredness and relief, not unlike an orgasm.  There are two things in life that bring organic relief to the soul.  One is the discharge of semen in sexual pleasure, the other is the passing of a soft, well-formed and substantial stool.  I occasionally prefer the latter if given the choice, as it is free from other emotional complications.

Cheers...!!  FatherC