The phrase "rain dogs" in this song refers to a habit dogs have of leaving home, then getting lost when it rains, because the rain has washed away the markers they have left to guide them.
Suggestion credit: James - Lexington, KY
According to 1985 interviews, Tom saw the phrase "Rain Dogs" as metaphor for lost human beings, people in pain with no sense of direction. People who sleep in doorways, people who don't have a social or physical place to belong.
"The Rose of Tralee" mentioned in the lyric refers to an 19th century Irish ballad about a girl named "Mary, the Rose of Tralee."
This song is referenced in the lyrics of the Bush song Everything Zen.
It really was so easy for Linda Ronstadt to score a hit with her Buddy Holly cover of "It's So Easy." She would sometimes change the lyric to: "It's so easy to have a hit, all you have to do is recycle it."