He recently has all his teeth taken out fot stomatitis, as well as some moth eaten teeth they found before taking the others out.
He is not this sweet normally. He was too stoic to catch the pain he was in previously.
Bonus post surgery not happy picture. 
He's like "I didn't know what happened, but I think I'm dying. I just want you to know, I'd still eat your face if I could. Let me touch that delicious face one last time."