Fingers on his skin have him shivering slightly, breath catching in his throat as they slide down, spread him open and his eyes close at the words. "A-Yao..." It's a soft exhale, acknowledgment and then Xichen makes a quiet choked noise at the unfamiliar sensation of a finger touching him there.

But he holds still, keeps himself steady and tries not to clench around that finger when it presses into him finally.