Harley Quinn and the Joker are the most popular cosplay - but why?

Our resident sci-fi geek and neuroscientist investigates the allure of the nasty, vicious and plain psychopathic

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Harley Quinn & Joker Cosplay

Steampunk Joker & Harley Quinn

Lady Gaga Wears Harley Quinn Costume in 'Joker 2' Set Photos

Cosplayer Girl in Harley Quinn Costume and Man in Joker Costume

10 Harley Quinn Cosplay That Are Both Sweet And Psycho

The Joker and Harley Quinn Cosplayed by Harley's Joker

Lady Gaga wears Harley Quinn outfit to perform with Rolling Stones

khaoscosplay: Good times with puddin' on the - Oh Sweet

How to Rock Suicide Squad's Joker + Harley Quinn As a Couples

Self] My self-designed Harley Quinn cosplay based on the Heath

Why was every female cosplaying as Harley Quinn? - Quora

The Top 11 'Suicide Squad' Harley Quinn Cosplays - Cosplay and Coffee