Apparently there's a bootleg version of Beth too.
Kiss' drummer Peter Criss sings the song, which was co-written by Criss and guitarist Stan Penridge. The song was written before Criss had joined the band, while he and Penridge were members of Chelsea. A bootleg exists of the song from 1971, but the song was sung "Beck, what can I do?" "Beck" was the nickname of fellow Chelsea member Mike Brand's wife, Becky, who would call often during practices to ask Mike when he was coming home.