I did something

what you do, baby?

The victorians used to have so called “mourning rings” which “mostly symbolized your connection to the person you lost, the sentimental value and the emotional impact (of the relationship)”.

They could have jewels, diamonds or even the person’s hair in them and were reserved for the closest friends and family members.

So, naturally I come to the conclusion that eight would keep locks of hair of people or things that remind him of them.

To me he seems like a locket guy and melancholically and wistfully stares at his memorabilias while bathed in the blue light of the tardis.

Remembering his granddaughter, lost dearest companions or friend, lover, best enemy.

Also the act of cutting one’s hair and giving it to someone else was also considered a token of love and friendship, to “hold the essence of someone deseased”.