Inflicted - The Guest Within — Jack Miller

Because he was a soul, by nature he was all things good: compassionate, patient, honest, virtuous, and full of love. Anxiety was an unusual emotion for Fords Deep Waters.
Irritation was even rarer. However, because Fords Deep Waters lived inside a human body, irritation was sometimes inescapable.
As the whispers of the Healing students buzzed in the far corner of the operating room, his lips pressed together into a tight line. The expression felt out of place on a mouth more often given to smiling.
Darren, his regular assistant, saw the grimace and patted his shoulder.
“They're just curious, Fords,” he said quietly.
“An insertion is hardly an interesting or challenging procedure. Any soul on the street could perform it in an emergency. There's nothing for them to learn by observing today.” Fords was surprised to hear the sharp edge marring his normally soothing voice.
“They've never seen a grown human before,” Darren said...