Kamasutra 2.3.6

2.3.6

rāga-vaśād deśa-pravṛtteś ca santi tāni tāni sthānāni na tu sarva-jana-prayojānīti vātsyāyanaḥ.

The following are the places for kissing, viz., the forehead, the eyes, the cheeks, the throat, the bosom, the breasts, the lips, and the interior of the mouth. Moreover the people of the Lat country kiss also the following places, viz., the joints of the thighs, the arms, and the navel. But Vatsyayana thinks that though kissing is practiced by these people in the above places on account of the intensity of their love, and the customs of their country, it is not fit to be practiced by all.