Don't eat lettuce if you want to have children
In the 19th century, English men avoided salads if they wanted to start a family. In The Oxford Dictionary of Superstitions (Iona Opie and Moira Tatem, Oxford University Press, £9.99), a book on 'Plant Lore' suggests that lettuce was detrimental to child-bearing because it was a 'sterile' plant, and "as plants exhibited peculiarities in their actions, so were they supposed to operate on man"