Enlightened

"Some people will never learn anything, for this reason, because they understand everything too soon."
-Alexander Pope

...Then there was the time that Spouse and I, in our endeavours to carry out a frugal life- which included an increasing awareness of electricity and of the number of lights about our house that we kept burning- discovered that our back porch light was in fact very much on; and, we deduced through bitter tears, it had been shining brightly for at least four months. Oh, the horror, and humiliation: I had boasted frequently to Mater of our economical lifestyle and had pressed her to turn off lights when she left a room in her own home.
A strip of duct tape pasted furiously over the switch soon ensured that no little child-visitor could fiddle, unseen, with the light to the back porch; and that Spouse and I would never again utilise the lamp which caused us much misery and a considerable setback in our confidence.