The Kama Sutra of Vatsyayana by Vatsyayana
There are nine kinds of sexual intercourse
There being thus nine kinds of union with regard to dimensions, force of passion, and time, respectively, by making combinations of them, innumerable kinds of union would be produced. Therefore in each particular kind of sexual union, men should use such means as they may think suitable for the occasion.
At the first time of sexual union the passion of the male is intense, and his time is short, but in subsequent unions on the same day the reverse of this is the case. With the female, however, it is the contrary, for at the first time her passion is weak, and then her time long, but on subsequent occasions on the same day, her passion is intense and her time short, until her passion is satisfied.
_On the different kinds of Love._
Men learned in the humanities are of opinion that love is of four kinds, viz.:
1. Love acquired by continual habit.
2. Love resulting from the imagination.
3. Love resulting from belief.
4. Love resulting from the perception of external objects.
(2). Love which is felt for things to which we are not habituated, and which proceeds entirely from ideas, is called love resulting from imagination, as for instance, that love which some men and women and eunuchs feel for the Auparishtaka or mouth congress, and that which is felt by all for such things as embracing, kissing, etc., etc.
(3). The love which is mutual on both sides, and proved to be true, when each looks upon the other as his or her very own, such is called love resulting from belief by the learned.
(4). The love resulting from the perception of eternal objects is quite evident and well-known to the world, because the pleasure which it affords is superior to the pleasure of the other kinds of love, which exists only for its sake.
What has been said in this chapter upon the subject of sexual union is sufficient for the learned; but for the edification of the ignorant, the same will now be treated of at length and in detail.
[Footnote 33: High unions are said to be better than low ones, for in the former it is possible for the male to satisfy his own passion without injuring the female, while in the latter it is difficult for the female to be satisfied by any means.]