Captain Jack is a song by Billy Joel, featuring on his 1973 album Piano Man. The song also features on many of his greatest hits albums, despite not being commercially succesful. William Martin Billy Joel (born May 9, 1949, in Bronx, New York) is an American singer, pianist, and songwriter. ... 1973 (MCMLXXIII) was a common year starting on Monday. ... Piano Man is a pop album by Billy Joel, released in 1973 (see 1973 in music). ...
Captain Jack was apparently a drug dealer living near Joel in New York, hence the lyrics "Captain Jack will get you high tonight..." However, Joel himself claims that this is in fact an anti-drugs song, and reflects the user becoming apathetic and lifeless. NY redirects here. ...
This song also makes an obvious reference to masturbation. "Your sister's gone out, she's on a date.You just sit at home, and masturbate."