Some possibilities as to the meaning of this song:
The lyrics are viewed through the perspective of a soldier who has been wounded and hospitalized. He sways in and out of consciousness, dreams of this nurse who he is attracted to, sees how nice she is is to him and "acts just like a nurse with all the other guys." He believes that she is attracted to him as well. This helps him get through the injury and recover. The atmosphere of this song is really white and dreamy. The scene is like a perfect morning, light sun-rays flowing slowly in the room from the windows.
It could be referring to a drug such as ecstasy: "I'm taking her home with me all dressed in white." The white could be a reference to a white pill, and the lyrics describe someone reacting to it. They may not react to it like other people, but the drug is taking effect and the person can feel this happening: "Say hello to the shrinking in your head. You can't see it but you know its there so don't neglect it."