GUYS: What gives you butterflies?

As a girl, I get butterflies when a guy touches my shoulder, hugs me, smiles at me when our eyes meet, show random acts of chivalry (such as pulling out the chair, opening a door, compliments me and when he calls me by my name.

What kind of things that girls do give you butterflies?

And what makes you notice a girl that you didn't used to have feelings for?
GUYS: What gives you butterflies?
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