it
are then put into each corner of the mouth; and if, when thus held in the
teeth, it passes readily over the head, the subject is taxable.

It is difficult to point out by what circumstance the sensitive motions of
the penis and of the throat and nose become associated; I can only observe,
that these parts are subjected to greater pleasurable sensations than any
other parts of the body; one being designed to preserve ourselves by the
pleasure attending the smell and deglutition of food, and the other to
ensure the propagation of our species; and may thus gain an association of
their sensitive motion by their being eminently sensible to pleasure. See
Class I. 3. 1. 11. and III. 1. 1. 15. and Sect. XVI. 5.

In the female sex this association between the face, throat, nose, and
pubis does not exist; whence no hair grows on their chins at the time of
puberty, nor does their voices change, or their necks thicken. This happens
probably from there being in them a more exquisite sensitive sympathy
between the pubis and the breasts. Hence their breasts swell at the time of
puberty, and secrete milk at the time of parturition. And in the parotitis,
or mumps, the breasts of women swell, when the tumor of the parotitis
subsides. See Class I. 1. 2. 15. Whence it would appear, that their breasts
possess an intermediate sympathy between the pubis and the throat; as they
are the seat of a passion, which men do not possess, that of suckling
children.

8. _Tenesmus calculosus._ The sphincter of the rectum becomes painful or
inflamed from the association of its sensitive motions with those of the
sphincter of the bladder, when the latter is stimulated into violent pain
or inflammation by a stone.

9. _Polypus narium ex ascaridibus?_ The stimulation of ascarides in the
rectum produces by sensitive sympathy an itching of the nose, as explained
in IV. 2. 2. 6; and in three children I have seen a polypus in the nose,
who were all affected with ascarides; to the perpetual stimulation of
which, and the consequent sensitive association, I was led to ascribe the
inflammation and thickening of the membrane of the nostrils.

10. _Crampus surarum in cholera._ A cramp of the muscles of the legs occurs
in violent diarrhoea, or cholera, and from the use of too much acid diet in
gouty habits. This seems to sympathize with uneasy sensation in the bowels.
See Class III. 1. 1. 14. This association is not easily accounted for, but
is analogous in some