Direct contact, when you touch or brush your skin directly against the plant.

Curious, he touched his thumb against the white square, but nothing happened.

She reached out to touch it against his skin, but he flinched away and removed the thing.

Feet of different sizes and shapes touched, briefly, against the glass.

He touched my hair with one hand, the other still against my back.

Let no man touch his hand against that iron.

She touched her lips against his, then sat up.

Cold touched him at the loss of her warmth against his chest.

Then his tongue slipped through to touch against her lips.

He touched the tip of the needle against the skin.