Sayyidah Aishah (may Allah be pleased with her) said that the Messenger of Allah (peace and blessings be upon him) used to kiss his wives while fasting; then she smiled. The narrator says: Urwah (may Allah have mercy on him) said: "I have not seen that kissing invites to any good."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8095