Cat
The domestic cat offers a companionship window of 15 to 20 years under optimal conditions, with some specimens exceeding 25 years through careful veterinary intervention and genetic fortune. This extended timeline enables the development of genuine relationships, accumulated shared memories, and behavioural patterns that approach something resembling mutual understanding.
Each day with a cat builds upon the previous, creating compound interest in emotional investment. The creature's personality unfolds gradually, revealing preferences, aversions, and idiosyncrasies that distinguish it from all other cats whilst remaining fundamentally, recognisably feline. This temporal depth cannot be replicated by any consumable product.
Sushi
Sushi's lifespan operates on an entirely different timescale. From preparation to consumption, the window of optimal enjoyment spans approximately 15 to 30 minutes at room temperature, with refrigerated storage extending viability to perhaps four hours before quality degradation becomes unacceptable. Beyond this, bacterial proliferation renders the product not merely unpleasant but genuinely hazardous.
This ephemeral nature defines sushi's essential character. It exists as a fleeting pleasure, a moment of perfection impossible to preserve or extend. The transience is part of the aesthetic, the Japanese concept of mono no aware made edible, but it fundamentally limits the depth of relationship possible between human and fish.