This was the first single from the "Trouble" album. Sadly it wasn't a hit as a single, I don't know why unless its suggestive lyrics denied it radio play. But that didn't stop certain other records from becoming hits, so I don't know what happened with this one. Nevertheless, it's a great song, so enjoy it!
Note: the 1979 on the video refers to the date of that particular performance of it (25 January 1979) and not to its release date (which was, in fact, 29 September 1978). The album was released in October 1978.