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When girls wear pigtails, it gives off a vibe of cute feminine innocence. When she is jacked, it adds to that cognitive dissonance we experience when seeing a cute and feminine but super buff girl.
Here's one from 2012
and these aren't pigtails, I suppose, but close enough?
Lili Dong
Joanne Wilson
Karina Akmens
Camryn Creager
Penny Paige
Brings to mind what Pippi Longstocking would look like all grown up.
When girls wear pigtails, it gives off a vibe of cute feminine innocence. When she is jacked, it adds to that cognitive dissonance we experience when seeing a cute and feminine but super buff girl.