Former president Bill Clinton indulged in some (literal) bathroom humor at the dedication of the George W. Bush Presidential Library, joking that he didn't want his successor painting his portrait.

“I probably shouldn’t say this, but I’m going to anyway,” Clinton said. “Your mother showed me some of your landscapes and animal paintings, and I thought they were great, really great. And I seriously considered calling you and asking you to do a portrait of me -- until I saw the results of your sister’s hacked e-mails. Those bathroom sketches were wonderful, but at my age, I think I should keep my suit.”

Two self-portraits Bush painted were leaked as part of the family e-mail hack -- one in the shower and one in the bathtub. The artist commented on the works in an interview with ABC Wednesday night, telling Diane Sawyer that the paintings "may reflect my precocious nature."

Clinton also joked that it "sends a chill down my spine" to think that his private political conversations with Bush might be stored in the library. More seriously, he thanked Bush for his work in Africa, in particular the aid given under PEPFAR (President's Emergency Plan for AIDS Relief). "I have personally seen the faces of people who are alive today because of Bush," Clinton said.

Bush's father, George H.W. Bush, offered a tamer joke. After a very brief speech, he turned to his son and asked, "Too long?"