Olfactory

If you've ever loved the smell of WD-40, you're either haunted by memories of your dad's garage (where emotional vulnerability went to die) or your nose is picking up hints of the old country—where gears and guns went hand in hand, and therapy wasn't an option.

Alternatively, you might just be on a steampunk adventure, cosplaying as someone who has their life together while wearing the most amazing earrings. Either way, these are for people who romanticize machinery because at least gears are predictable, unlike human relationships.