Sayyiduna Abu Mas'ud al-Ansari (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "The first thing that people found from the words of prophethood is this: When you feel no shame, do whatever you wish."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20787