I don’t know the artist who sings this song, but it is very well produced and I am very surprised that I can’t google the lyrics and come up with the song…
The song is about a guy who picks up a girl, I think he has a truck, and I think the girl is a prostitute. She gives him a handjob, and he’s enjoying it. He looks down and see’s that she only has three fingers. The chorus goes on about how she has three fingers and she doesn’t need the other two.