He didn't exactly dispute it. He said it wasn't his "customary behavior" to "date" teenagers.
You have to remember he was young and unmarried this was almost 40 years ago NOT last year.
Teenagers ok Alabama in the 1970s. A kernel of truth then comes the rest of the lies. Did he know them yeah, but did he do anything against the law or believe and say he did nothing wrong or had impropriety against them? The answer to that is ‘no’.