Perfect, Blaine thought as Kurt began to instantly respond to him, rocking down against his tongue, and cursing. Blaine wished he could see him, watch his face as he came apart like this, but he was kind of busy at the moment, and he certainly wasn't going to give up making react like this just to watch it.
Instead, he hummed softly, both with pleasure and to add a new sensation to Kurt's body. His hand slid up his cock, twisting over the head for a moment, thumb sliding across the slit again and again as his tongue began wriggling in earnest.