Al-Aswad bin Yazid (may Allah have mercy on him) said: I said to Sayyidah Aishah (may Allah be pleased with her): May a fasting person engage in intimate contact? She said: No. I said: Did the Messenger of Allah (peace and blessings be upon him) not use to engage in intimate contact? She said: He was in control of his desire.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8091