"Oh, I dunno. I'm always up for some sort of mischief!" There had been somewhere that she was going with that wink. Had something to do with those boxers that he was tugging, she was sure, but Tonks had gotten distracted by the definition of a swirly.
Because a swirly? That was the most hilarious thing that she had heard of. "Head in the toilet! That's disgusting! But what if his hair got caught in the flushing? And what if he grabbed you and you both got flushed!" Dark eyes went very wide as she thought about it. "Toilet monsters aren't known for letting people go! Especially cute boys like you!"
There were no such things as toilet monsters, not even in the wizarding world, but she was imagining them. And right now, they were very real. In fact, she was trying to curl back on his lap to 'save' herself from those monsters.