It's not the food itself that's distracting, but the way he eats it that is.
He sucks quietly at the juices on the tip of each sausage piece before swallowing it down with a bob of his Adam's apple. When a bit of the gravy spills from his lips, his tongue daintily darts out to lick up the remnants before wiping his solemn mouth with his napkin.
Lionel's face reddens as he realizes he had been staring and because of a certain problem that decided to pop up because of it.
Lionel isn't quite sure what to say when Bertie asks if he is done eating and whether they should finish up the day's lesson, but he assumes that the evening will at least become interesting. More interesting, that is.