Responses
Actually, now that you're asking, I'm not sure XD I automatically thought it was a nipple because it was so close to his collar.
But if it is the arm, it's still kinda cute, aye? Like, affectionately pinching your fave person's fleshy arm after coming back from whatever your business. A gesture saying, "Hey, I'm back~ Did you miss me?"
After affectionate pinching, the next step or level would be gripping the back of the neck before sliding the arm over the person's shoulder as a greeting.
Anyone noticed He Tian pinching Mo's nipple but he let it happen and pass like it's no big deal? Our lLittle Mo's starting to let He Tian do whatever now~