Earworms who gets em? and what are they?

[Offroad]

I got caught in the rain at my grandson's soccer game Saturday and some guy came up to me as I was leaving and said he couldn't help but think of this song with one line about riding a motorcycle in the rain: https://www.youtube.com/watch?v=cih0btgJw8s

Must have been an "ear worm" for him ;-)