Crowley is glad he's wearing his sunglasses - he's got a great excuse for it in public, obviously, but another pleasant side effect is that he can watch Aziraphale eat without appearing weird or creepy. The way he savors his food is enough to make him want to shift in his seat, his mind immediately going to indecent thoughts.

"Sure," he murmurs, grabbing a bit of the toast from Aziraphale's plate, popping it into his mouth. He shrugs after a moment. "'s all right, I guess. I'm not really into avocados."

Does he say this to get the angel to gush some more? Possibly.