Book,  Paragraph

 1   I,  4 |           testes are internal the act of copulation is quicker
 2   I,  18|          these, the female in the act of copulation inserts a
 3   I,  18|     pleasure is at the end of the act, but it ought, on the theory,
 4   I,  21|        anxious to rear fine birds act thus; they change the cocks
 5  II,  1 |     motion that does this, as the act of building builds the house.
 6  II,  2 |         is entangled in it by the act of pounding them together,
 7  II,  4 |          in good health, for they act as a purification of the
 8 III,  1 | partridges which are taken out to act as decoys, whether they
 9  IV,  1 |          whether it have power to act as such in the thing itself
10  IV,  4 |    emission of semen and a single act of intercourse, it is better
11  IV,  4 |            as we say, it does not act in this way but brings together
12  IV,  5 |       above, for even in a single act of intercourse the semen
13  IV,  5 |          which corresponds to the act of intercourse in males)
14   V,  1 |       because it is its nature to act or be acted on in this or
15   V,  8 |           narrower part less.~The act of sucking in itself contributes