Hi, just a quick post to say that Stephan Halley has found the solution of my little enigma :
Q : Who said "'cause I'm more stubborn than a donkey and twice as slow" ?
A : Abraham Simpson to young Homer in The Simpsons.
Stephan also precised that it was in Season 9 Episode 3, but frankly my culture does not span that far...
I said the winner would get a full shibari set but as this product doesn't fit male avatars well... he won the Serious Shackles instead. Along with a gag, for having said the exact episode.
Congratulations Stephan !