Who said "Every adventure starts with someone saying 'why not?'"?

This quote is attributed to Heckle and Jeckle.

Every adventure starts with someone saying 'why not?' - Heckle and Jeckle

"Every adventure starts with someone saying 'why not?'"

Heckle and Jeckle Adventure

"Why be serious when you can be hilarious?"

"Life's too short to not laugh at yourself."

"A good prank shared is a friendship earned."

"Sometimes the best wisdom comes wrapped in a joke."

"The greatest adventure is life itself."

"The adventure of life begins with a single step."

"Adventure finds you when you stop running."

"Fortune and glory, kid."