Kamasutra 2.7.24

2.7.24

kīlām urasi kartarīṃ śirasi viddhāṃ kapolayoḥ saṃdaṃśikāṃ stanayoḥ pārśvayoś ceti pūrvaiḥ saha prahaṇanam aṣṭavidham iti dākṣiṇātyānām/ tad yuvatīnām urasi kīlāni ca tatkṛtāni dṛṣyante/ deśasātmyam etat//

The wedge on the bosom, the scissors on the head, the piercing instrument on the cheeks, and the pinchers on the breasts and sides may also be taken into consideration with the other four modes of striking, and thus give eight ways altogether. But these four ways of striking with instruments are peculiar to the people of the southern countries, and the marks caused by them are seen on the breasts of their women. They are local peculiarities, but Vatsyayana is of opinion that the practice of them is painful, barbarous, and base, and quite unworthy of imitation.