I remember him from his group "Robert Knight and the Fairlanes" when he was playing the small town venues in middle Tennessee, as he was living in Williamson County outside of Nashville. He performed Everlasting Love live in Shelbyville the same week it was at the top of the pop charts...many many years ago..
It's hot making love on a mountain apparently. However, from own experience with the altitude changes the opposite is in fact true.
It is very, very, cold.
Unless we're talking about a volcano, in which case Robert Knight is completely right. It is hot making love on a volcano.