Yahya bin Abd al-Rahman said that a young man asked Ibn Umar (may Allah be pleased with them both) about kissing while fasting, and he said: No. An old man who was with him said: Why do you put people in hardship and difficulty? By Allah! There is no harm in it. He said: You may kiss, for there is nothing left between your thighs.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8090