Taking it as an open invitation, Gamzee slides his tongue past the younger boy's teeth, his own lips parting a little, so it can twine with Tavros's and play in his mouth. The Slytherin makes a lower noise in the back of his throat, something more heated and excited, and his arms tighten around Tavros's waist. He feels a little dazed, almost floating, but it's a good kind of dazed, like the rest of the world is just fuzzy mist that hardly matters at all.