hurtful convenience

It was one of my early days at my workplace when i had an urge to address the call of nature. On such an occasion one feels relieved, literally and otherwise, on finding a decent loo, but imagine my bliss on finding one with an attachment to wash your ass clean once you are done with your job, with just the turn of a knob. It's no great deal, i admit, but then you won't find it every place.
After having finished doing the thing i turned the knob and had a strong jet of water directed straight at my sensitive rear end. I turned the knob to weaken the force -- fine -- but as fate would have it, i turned it the wrong way, and in response to the increased force i turned it further, again the wrong way. It took me some time to compose myself after what i thought was like a pointy steel rod shoved up my rear end.
That was one feeling of pain i have experienced. It must have lasted for a time interval no greater than one fourth of a second, but i cringe everytime i relive that one fourth second. It's like what you feel on the way down a joy ride making a 70 degree angle with the horizontal. The descent lasts only a few seconds, but you feel as though you have lived an eternity.
I guess it was the price of convenience, or perhaps of my foolishness.