Feigned indecision makes a coquette appear more alluring. [causal]
The coquettish woman enormously enhances her attractiveness if she shows her consent as an almost immediate possibility but is ultimately not serious about it. Her behavior swings back and forth between "yes" and "no" without stopping at either. She playfully exhibits the pure and simple form of erotic decisions and manages to embody their polar opposites in a perfectly consistent behavior
Georg Simmel, The Sociology of Georg Simm…, loc. 2217