On some deep human level he hasn't yet learned to recognize, he understands the sound of her voice as a cue that means he's safe.

His back arches. His whole body shudders violently. The orgasm overloads him, overwhelms him, and he can't be sure if his eyes are open or closed because all he can see is brilliance anyways as sticky heat spills between her fingers and over her belly in short thick bursts.

The breathless sound that escapes him is almost a sob of release.