A short intro on how to properly squish a hesky.
For kets especially.

Step 1: Aquire Your Hesk

Heskies might be a little surprised when you first come into contact with them, act casual but not too feverish.
Heskies are known to run away on first impulse when you approach.

Step 2: Firmly Grab Your Heskie's Cheeks of Fat

This part is probably the most detrimental step in squishing your hesky properly, grab in one swift motion and resist the urge to prematurely squish.
Keep a firm grasp as hesk may fight and try and break the hold.

(Kets should have no problem with this step)

Step 3: Move Your Grip in an Upward Fashion

Tighten the grip, but firmly allow the hesk cheek fat to slid within your hands, causing the lower cheeks to fluff up and an artificial forced "Smile" to come into formation.

Do not let go.

This is the step where hesks tend to fight the hold the most.

Step 4: Begin Pressing Hands Together Slowly

Gently but firmly squish your hands together allowing the hesky cheeks to smash.

Step 5: Smush Your Hesky

Go all out in a smash fest, and completely push heskie's cheek fat completely over its own face in a swifter motion at the same time letting the hesky know that the smashing process is almost near complete.