Yup, they are none too pleasant at all.
Fun fact about anal glands: it's thought that canids, at one time, could spray the contents of the sacs much like a skunk does. Eventually they lost that ability (thank god) and it just became a marking of territory type of thing, which is why they're expressed during BM. In domestic dogs they're worthless except for smelling up the joint (though technically a good thing for identification of dogs with one another) and getting ruptured.
Cleverly disguised as a responsible adult.
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, throughly used up, totally worn out, and loudly proclaiming --- 'WOW, WHAT A RIDE!!!!' " - Author Unknown