Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) said that the Messenger of Allah (peace and blessings be upon him) neither spoke obscenely nor deliberately tried to speak so; rather, he (peace and blessings be upon him) used to say: "The best of you is the one whose character is good."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20784