and resume the reading after one has regained poise and mastery
of one's self. That is, "_keep your head_" while you read these
lessons, and you will be all right.

IV

THE SEX ORGANS

And now, having given these cautionary directions, the way is clear
for the making of definite statements and the giving of positive
instruction.

Here, then, is a brief description of the sex organs in man and woman.
At first, only the names of the parts will be given, with such slight
comments and explanations as are necessary for making this part of the
subject clear. A detailed setting forth of the functions and proper
exercise of these organs will be given later.

The sex organs in a male human being consists, broadly speaking, of
the penis and the testicles. All these are located at the base of the
abdomen, between the thighs and on the forward part of the body. The
penis is a fleshy, muscular organ, filled with most sensitive nerves,
and blood vessels that are capable of extension to a much greater
degree than any of their similars in other parts of the body. In a
quiescent, or unexcited condition, in the average man, this organ is
from three to four inches long and about an inch or more in diameter.
It hangs limp and pendent in this state, retired and in evidence not
at all. In its excited, or tumescent condition (the word tumescent
means swelled, and is the technical word for describing the erect
condition of the penis) it becomes enlarged and rigid, its size in
this state being, on an average, six or seven inches long, and from
an inch-and-a-half to two inches in diameter. It is almost perfectly
cylindrical, slightly thicker at the base than at its forward part.

The testicles are two kidney shaped glands, not far from the size of
a large hickory nut, and are contained in a sort of sack, or pocket,
called the scrotum, which is made for their comfortable and safe
carrying. The scrotum hangs directly between the thighs, at the base
of the penis, and in it are the testicles, suspended by vital cords
that are suspended from the body above. The left testicle hangs a
little higher in the sack than the right, so that, in case the thighs
are crowded together, one testicle will slip over the other, and so
the danger of crushing them will be avoided. This is one of the many
ways which the Maker of the human body has devised to insure the
proper preservation of the vital organs from harm, a fact which
should inspire all hum