According to Wikipedia…
The graham cracker was developed in 1829 in Bound Brook, New Jersey, by Presbyterian minister Rev. Sylvester Graham. Though called a cracker, it is sweet rather than salty and so bears some resemblance to a cookie (American English) / biscuit (British English) (although the term is unheard of in the United Kingdom/Republic of Ireland – a digestive biscuit is the closest approximation). The true graham cracker is made with graham flour, which is unsifted and coarsely ground wheat flour.
It was originally conceived of as a health food as part of the Graham Diet, a regimen to suppress what he considered unhealthy carnal urges, the source of many maladies according to Graham. Reverend Graham would often lecture about the adverse effects of masturbation or “self-abuse” as he called it. One of his many theories was that one could curb their sexual appetite by eating bland foods. Another man who held this belief was Dr. John Harvey Kellogg, the inventor of the corn flakes cereal. 
Does anyone believe this?