Tavros probably would have let him if he'd tried, willing to do anything to keep the other boy happy, even if he isn' ready for it. He hasn't actually thought that far yet anyway, too caught up in the fact that this was really happening for real.. The tongue doesn't bother him at all though, even if he does gasp a bit in surprise. He falls back into it easily enough, already having figured out at least a little of what Gamzee likes.