However, it also appears that Babs may have borrowed it from Lenny, according to this citation, dated 1999. Scroll down to post #11110 (fourth down on the page) and to #22:
22. "Clinton lied. A man might forget where he parks or where he lives, but he never forgets (oral sex) no matter how bad it is." Lenny Clarke
The Lenny Clarke Quote cited above has parentheses around oral sex...that prolly wasn't the word he used...and, I'm sorry, but Barbara Bush making such a statement (whether wit on loan or her own) undoubtedly says more about her experiences with sex than it says about anybody else's.