There is some strong evidence that this song is about oral sex - both giving and receiving. References include: "He's all puffed up," "He's living with you, sleeping in your bed," "Dive down in the deep end," "Let him sit beside you and eat right of your plate," "Don't you know, his tongue can kill." Other references include some explicit visual hints in the video, and Gabriel's movements performing the song live, as seen on the Secret World Live
DVD, with the most obvious being Gabriel standing on a chair and thrusting his hips.
Markus - Molnlycke, Sweden