I've had stool samples obtained by incontinence induced by two bisacodyl interspersed between six glycerine suppositories while lying on a protective/absorbent green pad.
Some patients, such as I, don't respond as reliably to acid phosphate enemas as this clinic's staff would like. They don't have a commode in the treatment room, and they don't want their patients to be clothed, in case of some kind of accident. So, they came up with the above procedure.
At my insistence, my wife was in attendance from insertion through involuntary defecation. She entertained me while waiting for the effects to begin.
She dutifully observed the beginning of the cramping/large-propulsive-waves, at which time the 1/2 bisacodyl suppository was inserted just inside the sphincter-ring so as to accelerate the irresistible reflexive sphincter relaxation.
She encouraged me during the building urgency and rectal discomfort, and she comforted my during my failure to hold out until given (not forthcoming) permission to use some commode.
It seems that someone felt some urgency to do whatever they were doing, that they felt was greater than my urgency to expel. They later went to a 4.5 oz enema of water, bisacodyl and glycerine for folks like me. We get to wear a cloth full-coverage gown, and to visit the commode upon the beginning of cramps/contractions, and before the rectal urgency, which is now allowed to occur without any further encuragement. A nurse stays for the whole procedure, from injection to expulsion on a special sample-capturing commode. If I have it done again, I'm *still* going to insist that my spouse be there with me!
LisaLax decided that I was extra 'cute' during the ordeal, so has added something like it to her bag of tricks. Now when she gives me her favorite suppository cocktail of 4x 1/2 bisacodyl (b) and 5x glycerine (G) as GbGbGbGbG, I never know if she's going to "keep cuddling" me, heh.
If there is interest, I'll relate her expansion of this suppository cocktail into recipes which produce detailed variations effects (beyond the obvious). She has enjoyed "experimenting" on me with various medicines, especially laxatives, for many years. This has added a whole new dimension to her repertoir and to my suspense, as I am not allowed to know what she has given me until it has produced her desired result, hehe!