Who said "Why do I always say the wrong thing at the wrong time?"?

This quote is attributed to Charlie Brown.

Why do I always say the wrong thing at the wrong time? - Charlie Brown

"Why do I always say the wrong thing at the wrong time?"

Charlie Brown Truth

"Good grief!"

"I got a rock."

"Rats! I did it again."

"Why is it that everything I do turns into a disaster?"

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."