Sense no. 1: Feeling. (Where there are areas that go ..., that is where I decided to skip over a couple paragraphs, just so I don't ruin the book for you in case you might want to read it.)
"'...You don't have hair.' Thandi points to Liz's head which is completely bald except for the earliest sprouts of light blond growth.
Liz strokes her head with her hand, enjoying the odd smoothness of it. What hair there is feels like feathers on a newborn chick. She gets out of bed and looks at her reflection in the mirror. Liz sees a girl of about sixteen with very pale skin and greenish blue eyes. The girl, indeed, has no hair.
'That's strange', Liz says. In real life, Liz has long, straight blond hair that tangles easily.
'Didn't you know', Thandi asks.
Liz consideres Thandi's question.
...'Hey, I've got weird things, too.' Thandi raises her canopy of braids like a theater curtain. 'Ta da', she says, revealing a small but deep, still-red wound at the base of her skull.
...'How did you get that?'
'Don't remember', says Thandi, rubbing the top of her head as if she could stimulate her memory with her hands. 'It might have happened a long time ago, but it could have been yesterday, too, know what I mean?'
Liz nods. Although she doesn't think Thandi makes any sense, Liz sees no point in arguing with the crazy sorts of people one meets in a dream.
'We should go', Liz says.
On the way out, Thandi casts a cursory glance at herself in the mirror. 'You think it matters that we're both wearing pj's?', she asks.
Liz looks at Thandi's white nightbown. Liz herself is wearing white men's-style pajamas. 'Why would it matter', Liz asks, thinking it far worse to be bald than underdressed. 'Besides, Thandi, what else do you wear while you're dreaming?'
~ from Elsewhere by Gabrielle Zevin, p. 11-13