So, while toodling around in Pokemon-amie, I've learned that pokemon have places they like to be pet and places they hate to be pet. This is what I've learned so far:
Greninja likes it's tongue/scarf to be pet.
Honedge doesn't like it's cloth arm thing to be pet.
Slurpuff likes that round thing on top of it's head to be pet.
Absol doesn't like it's horn to be pet and likes that hair tweak thing on the opposite side of it's face to be pet.
More research into this must be done...