Who said "The key to a good relationship is communication."?

This quote is attributed to Cosmo Kramer.

The key to a good relationship is communication. - Cosmo Kramer

"The key to a good relationship is communication."

Cosmo Kramer Relationships

"Giddy up!"

"These pretzels are making me thirsty."

"I'm out there Jerry, and I'm loving every minute of it."

"It's not a lie if you believe it."

"The key to a happy marriage is communication."

"Marriage is about compromise and understanding."

"Life's greatest treasures are relationships."

"Trust is a luxury I can't afford."