Zach was just...really confused and mildly turned on and still a touch depressed. Overall, it made for a very uncertain state in his mind, and his arms were around Colin, but it didn't quite feel proper to just start...molesting his boyfriend every time Colin made an innuendo without meaning to. Though doing stuff to Colin was now filling the mental images in his head. They were a whole lot nicer than the last ones which had been there, mainly things such as Cedric's corpse when Potter had reappeared.
Okay, so if there was a way to turn himself off, maybe that was one of them. Corpses weren't his thing. Especially of boyfriends. But Colin was still...moving and twisting and turning all while on his lap. And former dead boyfriend or no, Zach had a man's body that reacted like any man's body would with his significant other on his lap squirming about.
And oh the way his mind was taking those things. Colin didn't mean them like that, Zach told himself, again. "You seem to have ideas," Zach replied, "and it is about what you want." Zach wasn't going to push Colin to do anything he didn't want to. Sexually or otherwise. Whenever he was ready and wanted to or whatever. It was the right thing to do.