According to female voters on Ranker.com, here are the Top 10 subtle turn-ons:
He makes you laugh.
He puts his hand on the small of your back.
He pulls you in closer to him when he’s sleeping.
He listens when you want to vent.
He squeezes your hand randomly.
He bear hugs you from behind.
He kisses you on the forehead.
He runs his hand though your hair.
He cooks you dinner.
He buys your favorite snacks ... just because.