Dog
Dogs impose non-negotiable financial obligations. The ASPCA estimates annual ownership costs between $1,500 and $4,500, encompassing food, veterinary care, grooming, and the replacement of shoes destroyed during the experimental phase of puppyhood. Beyond monetary expenditure, dogs demand time: walks regardless of weather, attention regardless of deadlines, and presence regardless of preference.
The true cost extends to opportunity sacrifice. Dog owners report declining 73 percent more social invitations due to pet-related constraints. Spontaneous travel becomes logistically complex. The lie-in becomes a theoretical concept discussed with wistfulness.
Nostalgia
Nostalgia operates at zero marginal cost. It requires no equipment, generates no veterinary bills, and cannot chew through electrical cables. The memories it accesses have already been paid for through lived experience. Each nostalgic episode represents pure return on historical investment, a dividend from the past that arrives without invoice.
However, economists note that nostalgia carries hidden opportunity costs. Time spent contemplating former glories is time not spent creating new memories. Excessive nostalgic dwelling correlates with reduced present-moment engagement and, in clinical populations, with depressive symptomatology. The free lunch, upon inspection, may contain hidden charges.
VERDICT
Nostalgia costs nothing in currency, though it may extract payment in present-moment attention. Dogs cost everything in currency and also extract payment in present-moment attention.