Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 18
व्रजवनौकसां व्यक्तिरङ्ग तेवृजिनहन्त्र्यलं विश्वमङ्गलम् ।त्यज मनाक् च नस्त्वत्स्पृहात्मनांस्वजनहृद्रुजां यन्निषूदनम् ॥ १८ ॥
vraja-vanaukasāṁ vyaktir aṅga tevṛjina-hantry alaṁ viśva-maṅgalamtyaja manāk ca nas tvat-spṛhātmanāṁsva-jana-hṛd-rujāṁ yan niṣūdanam
O beloved, Your all-auspicious appearance vanquishes the distress of those living in Vraja’s forests. Our minds long for Your association. Please give to us just a bit of that medicine, which counteracts the disease in Your devotees’ hearts.
According to the ācāryas, the gopīs repeatedly entreat Lord Kṛṣṇa to place His lotus feet on their breasts. The gopīs are not victims of material lust, but rather they are absorbed in pure love of Godhead and thus want to serve Lord Kṛṣṇa’s lotus feet by offering their beautiful breasts to Him. Materialistic persons, who are victims of mundane sex desire, will not be able to understand how these conjugal dealings take place on a pure, spiritual platform, and that is the materialists’ great misfortune.