question about a friend

not transgender, bi. i'm totally open to all lgbt related things, just have a huge curiosity. my friend want's to see what she looks like with out breasts and see what she looks like as a boy and all of that which is totally normal. i'm just wondering, she specifically told me she wants to dress as a little boy. like, a kid. and that really confuses me. i'm really interested in this sort of thing and when i asked her why she said she didn't know. i'm a bit of a psychology junkie and my curiosity is killing me. just want to clarify that i'm not judging. do any of you have the same desires as her, with the little boy thing?