He's tense, the words keeping his attention although the next time he opens his mouth, it's because of the sensation of that finger pushing into him, Song Lan's hissing out a breath as he tries to pull away from the intrusion.

But it's not painful, it's just alien, the pressure and slickness leaving him breathing a little harder, his head dropping forward slightly. "..Not that." He does manage the words, his fingers twitching, digging into his palms.