errr derr... Yes they do... I got one of them spy pens when I was a kid and 10 mins after writing something you couldn't see shit...
some folks will never see shit,,, even when they are up to their knees in it.. ( please please,, that is just a general observation,,not meant to be personal,, i dont want banned !!! )
the trick with being up to ya knees in shit is walking out of it smelling sweet. I've never mastered that bit...
now there's a man who can make an argument out of nothing,, bet he did well in his debating society...