The reason I was able to "get it" was because I encountered a cartoon on FB that I just could not work out and it really got to me...and I kept seeing pop up.
It showed a guy on a "soap box" preaching to folk walking by that "vampires were everywhere" ...made no sense to me however in the scene there were two guys carrying a large mirror ( as indicated by signage) and it was only reflecting the street not the people walking about...and so the guy preaching was preaching to vampires all around him...
How my brain held the trivia about vampires and reflection I can not say.
The current cartoon I could not fathom for a while (2 minutes) but then I noticed the telescopes were different and it then droped into place.
I saw it as one bloke checking out house windows while the other looked at the sky. I had forgotten reflectors use mirrors, yet always check that mine is clean.
Pete
If vampires can't see themselves in mirrors, how is it that their hair is always neat?
I expect that the only vampires that one gets to see are those in the movies and therefore we can reasonably deduce that their hair is always neat because those in "make up" cause it to be so.
I had to ask him to explain and then I had to 
I used to be fairly bright. 
don't know much about Vampires. 
