69 is eternal, or at least as long as Arabic numerals remain in use. 67 does not replace 69, it lives alongside it. But 69 will outlast it. It was first referenced in 1790 https://www.dictionary.com/e/slang/69/ and will be repeatedly rediscovered by future generations

From Charlie Barnett

“My favorite position is 68. She does me and I owe her one.”