The sound of a careless mattress.

The story:

I just recently found the cassette of the album that this song is from in a Goodwill store, and while it has quickly become my favorite Irene Cara song, I was troubled from the beginning because I was, like, so sure that she was saying "careless mattress," but I was wondering what the hell a careless mattress was or why such a stylish pop diva would sing about it. It was only when I grabbed the liner notes from the tape and actually read the lyrics for the song that I discovered what she was really saying.