Makkachin has also been introduced to and used to far more alien smelling and looking aliens than this poor man, not that Victor knows that's going on, and not that Makkachin can comment on any of it. He reacts more to intent than anything else; Wikus isn't trying to attack. To Makkachin, that's enough to make him a potential friend.

To Victor, who pays attention to how his dog interacts with others, it means much the same.

"Yes, of course. He loves making new friends. He also loves if you scratch right over his haunches, but the ears? I've seen Makkachin melt for a good ear scratching." Melt being more of a flopping over or leaning into the person giving him ear scratchings, but it all lead to about the same result of blind canine adoration.