Arms.
From Create Your Own Story
You lean her on the wall and raise her arm to your mouth. You lick her from her wrists up to her shoulder. She giggles with delight. You hold her arm up in the air, her armpits with no hair. You flick your tongue up and down her armpits. She starts laughing.
"HAHAHA! Stop that! Hehehe!" She laughs.
You stop, and...