Vatsyana, the author of
Kamasutra, says that there is no fixed place or time for
lovemaking.
Pains and Pleasures of Passion
Man, according to the size of his lingam, is divided into three
classes. The hare man, the bull man and the horse man. Woman also,
according to the depth of her yoni, is either a female deer, a mare
or a female elephant. There are three equal unions between persons
of the same size, and there are six unequal unions, in the case
where the dimensions are not compatible.