There are two types of pain.
The first is physical. It's being cut. It's being punched. It's being torn limb from limb.
Bog could take that pain. He'd been taught to take that pain.
The second is emotional. It's hurt. It's rejection. It's heartbreak.
For the first time, Bog couldn't take the pain. He'd never experienced something so excruciating. Would he die from this? A part of him wished he would. A broken heart felt like it was a wound that would never heal.
The other part just never wanted to feel that pain again.
So he never would.