I understand how you might react without permission and assume compliance.

His fighting experience took over, and he reacted without thought or hesitation.

"But they react without anyone having to tell them to, don't they?"

Automatically she looked toward the window, reacting to the question without thought.

For what seemed like forever, she had been merely reacting to a series of crises, without the opportunity to think things through.

The voices spoke to him, and he reacted without question or pause.

Resolve - React, without blame, and you will learn through dialogue.

She reacted to exterior stimuli, including his voice, without conscious will power.

It took her another moment to realize the implications; then she reacted without thought.

She fought at expert status now, body reacting without thought.