Kamasutra 2.10.19

2.10.19

tat kārya-hetor anyatra saktayor vā [3]kṛtrima-rāgam.

(3) When a man carries on the congress by exciting himself by means of the sixty-four ways, such as kissing, etc., etc., or when a man and a woman come together, though in reality they are both attached to different persons, their congress is then called "congress of artificial love." At this time all the ways and means mentioned in the Kama Shastra should be used.