“I glared at him and stuck out my tongue, lowered my head so we were face-to-face with each other and said, ‘Aaahhhh!’”: Gene Simmons recalls the rivalry between Kiss and Black Sabbath in the ’70s

Gene Simmons in the '70s.

Kiss star Gene Simmons says it very simply: “I've always loved and admired Black Sabbath. And can proudly say the early days of touring together will be a lifelong memory.”

But as he admits, there was a fierce rivalry between Sabbath and Kiss during their brief time together on a US tour in 1974.