Dr. Temperance 'Bones' Brennan: Sweets... has scars on his back. Old one.
Dr. Gordon Wyatt: Really?
Special Agent Seeley Booth: What kind of scars?
Dr. Temperance 'Bones' Brennan: Like he'd been whipped.
Special Agent Seeley Booth: Whipped?
Dr. Temperance 'Bones' Brennan: I saw them.
Dr. Gordon Wyatt: That explains his near obsession with your childhood trauma.