Are the hadiths that mention the Messenger, may Allah bless him and grant him peace, kissing the private parts of Al-Hasan and Al-Husayn authentic?

The Prophet, peace and blessings be upon him, kissed Al-Hasan ibn Ali, may Allah be pleased with them both. Al-Aqra' ibn Habis commented on this, saying that he does not kiss any of his ten children. The Prophet, peace and blessings be upon him, replied to him: "Indeed, whoever does not show mercy will not be shown mercy." Other narrations, which some scholars of Hadith have deemed weak, state that the Prophet, peace and blessings be upon him, kissed Al-Hasan in another instance.