He was tangled in the sheets, one arm flung above his head, the other under her neck.
He slipped a hand under her neck and worked on the tense muscles there.
"Based on the red thing under its neck, it looks like a male rather than a female."
He rested then for a little while, his arm under my neck.
As she tucked a towel under his neck, he grinned up at her.
I lay down and slid my arm under her neck.
Then her arm slipped under his neck, striving to raise him.
The reins went around his wrists under the horse's neck.
The hard pillow under his neck felt damp and cold.
He put the rifle barrel under his neck and pulled the trigger.