I have a weakness for things like this. Too funny.
And in any case aged about three I had a 'thing' about the Big Bad Wolf and used to tell my Dad to close the gate properly when he went to work. I think a ridiculously scary picture on a bookmark sent to me by Grandma-in-Wales along the lines of 'Don't go with strangers,' (but read books and look at this terrifying picture every time you open a book...) got conflated in my mind with the rabies warning poster you used to see on cross channel ferries of a ... terrifying dog licking its chops. Then there was the dog with the very loud bark that lived in the house behind ours. I'm not a dog person.