We not only have the natural appetites but the acquired appetites, which
are related to desires but in their action they are like original
appetites. Artificial appetites may be inherited. This is especially
true in the case of the children of the drunkard, opium taker and
tobacco user. This is probably due to the effect upon the nervous
system, and it is, as a rule, for the effect upon the nervous system
that these things are taken. Or, they may be acquired by the
individual’s deficiency of self-control and a natural inclination on his
part to act the braggadocio or abandon, deluding himself that he is
acting manly, and endeavoring to create a like impression upon others.