Manava Dharmashastra 2.213

2.213

eṣā prakṛtiḥ strīṇāṃ yannarāṇāṃ dhairyecyāvanam | saṅgāddhi striyaḥ puruṣānvantrāuccyāvayeyuḥ | ato'rthād asmāddhetoḥ na pramādyanti | dūrata eva striyaḥ pariharanti | pramādaḥ sparśādikaraṇam | vastusvabhāvo'yaṃ yattaruṇī spṛṣṭā kāmakṛtaṃ cittasaṃkṣobhaṃ janayati | tatra cittasaṃkṣobho'pi pratiṣiddhaḥ tiṣṭhatu tāvadaparo grāmyadharmasaṃrambhaḥ | pramadāḥ striyaḥ |

Medhātithi’s commentary (manubhāṣya):
It is the nature of women that they make men fall off from their fidelity: by associating with men, women would make them deviate from their vow.

For this reason the wise are never ‘unguarded’; i.e., they shun women from a distance;—‘unguardedness’ would consist in touching her and so forth.

It is in the very nature of things that a young woman, when touched, produces a disturbance in the mind; and this mental disturbance itself has been interdicted, to say nothing of other vulgarities.

‘Pramadā’ means woman.—(213)