Kamasutra 2.2.15

2.2.15

lateva śālam āveṣṭayantī cumbanārthaṃ mukham avanamayet/ uddhṛtya mandasītkṛtā tam āśritā vā kiṃcid rāmaṇīyakaṃ paśyet tal latāveṣṭitakam//

(1) When a woman, clinging to a man as a creeper twines round a tree, bends his head down to hers with the desire of kissing him and slightly makes the sound of sut sut, embraces him, and looks lovingly towards him, it is called an embrace like the "twining of a creeper."