I think it's a song about the limits that we can know someone, and the barriers we erect to prevent from being known fully. In the first verse he dreams of a paradise where one-dimensional women are there just to satisfy his needs. This is contrasted with the real woman he loves, who has her own life, her own needs and sorrows. She has a dying father, but she struggles to reach out to him; the couple take consolation in sexual intimacy, but as she sleeps he realises that he only knows her superficially and will probably never know her truly (her dreams are a sea too far to reach). But he's not deterred, in the morning he'll make love to her again, he'll continue to explore her.
I think it's a song about the limits that we can know someone, and the barriers we erect to prevent from being known fully. In the first verse he dreams of a paradise where one-dimensional women are there just to satisfy his needs. This is contrasted with the real woman he loves, who has her own life, her own needs and sorrows. She has a dying father, but she struggles to reach out to him; the couple take consolation in sexual intimacy, but as she sleeps he realises that he only knows her superficially and will probably never know her truly (her dreams are a sea too far to reach). But he's not deterred, in the morning he'll make love to her again, he'll continue to explore her.