"Defending the Caveman" is a unique performance that impressed the audience in 40 countries and in 30 different languages. The play presents the way to reconcile differences between men and women. It was played for the first time in 1991 in San Francisco. The Caveman gradually turned into an absolute hit filling theatre halls to their brim.

The caveman's message is universal for both sexes and laughter is the same in all languages.

Thanks to Refan's financial and moral support, the performance got its premier performance in NDK in Sofia.