What can attract you in a girl?

So to the boys , tell me what can attract you in a girl. And by that i dont mean to intentionally seduce , but what she does unintentionally that will make your heart jump and feel goosebumps or even have fantasies about her ( like kissing her or having sex together ) . In general , her behaviour with other or simple things -like how she flip her hair , how she smiles , when she touches your hand or maybe call your name- that make never stop thinking about her?

What can attract you in a girl?
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