It rumbled through her, her body echoing with primitive response.

Fear is our most primitive and important response.

Fear of the new drives this primitive response.

Sometimes he felt like a bloody baboon, his most primitive responses unleashed without warning, by some random assault of odor.

She shook her head, bemused by her own primitive response.

It was a primitive response to the coming of night.

There was some deep, primitive response to the male who would throw himself between his mate and the predator.

She couldn't help it, even though she was ashamed to be giving in to such primitive responses.

"As far as we knew before, primitive emotional responses."

One sure device for eliciting this endearingly primitive response is the tongue-in-cheek program note.