It is a well-known fact in malacology that the overwhelming majority of snail species is dextral. Their shells are coiled clockwise. It has less frequently been emphasized that right-handed persons tend to figure a snail’s shell as sinistral. I noticed this phenomenon for the first time when I got as a nice present a large painting of a variety of fantasy-snails in bright colours. It had been created by about ten c. 5 years old crèche children, working together but on separate snails. Unfortunately the paper was of a very poor quality and this piece of real art does not exist anymore and cannot be reproduced. When a coiling direction could be recognized, it was sinistral in nearly all cases. Only two snails were clearly dextrally coiled. I hypothesized that one child of the group would differ from the others. So I asked who had drawn those dextral snails, thinking that that child might belong to the left-handed minority. It was not the case. The girl in question was right-handed, but, the teacher had assisted this child by drawing the difficult spirals for her, as a start, and that teacher was, indeed, left-handed.
The phenomenon can be observed at many places. Here I refer to Mollusc World 10, with Jane Bonney showing snails figured on boats (p. 7), most of which as sinistral ones (figures 2?, 4, 6 and 10), and (p. 15), Jim Logan presenting another good example of the common occurrence of printed sinistral snails. It has often been cited that the Creator has to be fond of beetles, and left-handed, I would like to add.