Definition
The scarcity effect is the cognitive tendency to assign more value to something simply because it is rare, limited, or hard to obtain. The same object becomes more desirable when its supply shrinks or its availability is threatened — even though its actual usefulness has not changed.
In seduction, this bias is the engine behind withdrawal, withholding, and the pursuer reversal: a person who becomes less available starts to feel more valuable.
Why it matters
How it works
People judge value relative to availability rather than on absolute merit. When something feels abundant, attention drifts; when it feels scarce, attention sharpens and desire follows. The bias is partly a fear of regret — missing out feels worse than the gain feels good — and partly an inference that limited things must be limited for a reason.
A seducer or marketer triggers it deliberately: a person turns cold, an offer adds a deadline, an opportunity is framed as exclusive. The substance is unchanged; only the framing of supply has moved.