Sheepskin is Highly Flammable

One of favorite things to do on Sundays is curl up on my huge red couch with my green silk shorts pajamas and my Ugg boots to watch t.v. The boots, for those of you that are not familiar with Uggs, are made of sheepskin and are incredibly comfortable - they are really soft and fully lined to keep your feet at the perfect temperature in all types of weather.
As I lounged dreamily on the couch in my preferred lounging attire, I could feel the heat of the sun as it shone through my balcony doors. Surprisingly enough it made me feel quite warm despite the chilly weather outside and the fact that I was only wearing flimsy shorts.
As I lazily considered how strong the sun was shining on such a chilly October day I was awoken out of my daze by an odd smell. Why did it suddenly smell like smoke? "Oh God, did I leave eggs hard-boiling for over an hour again and char another saucepan?"- I thought to myself.
Just as I was about to race to the kitchen, I realized that all around me a cloud of thin white smoke had developed. My eyes darted frantically all over the room in a frutiless attempt to discover the source of the fire but everything looked intact... and then,
I looked down.

The smoke appeared to be coming... from my left Ugg!!! A tiny brown spot (almost like a cigarette burn) was forming on my previously impeccable white boot and gradually burning its way through the sheepskin... the thin cloud of smoke rising up from it was now heading towards the ceiling. Inexplicable, I could not fathom what the hell was going on around me:
Were my boots spontaneously combusting?
Was I?
So many horrific images raced through my head as I tried to understand what was happening, and then my eyes rested on the vanity mirror I had left on the living room floor earlier after a brief eyebrow tweezing session. The mirror was positioned at a 45 degree angle from my boot and a ray of sun from the balcony was shining directly into it, another beam of refracted light was at the same time busy burning its way through my boot.
I jumped up and patted down my burning Ugg to stop the fire, still reeling from my discovery. How could this really be happening? I thought that only highly skilled cub scouts and McGyver were able to start fires with mirrors, how could this happen to me and my ridiculously overpriced boots????
Well, my friends, some mysteries are just better left unexplained and as I have (unfortunately? fortunately?) grown accustomed to having things happen to me that just dont seem happen to anyone else (unless you count characters on mexican soap operas, of course ) I have learned just not to ask.
Oh, and to only keep my mirrors in windowless rooms from now on, just in case....