Looks like the kinda face people make when you suggests two things that don't normally go together...like when people see me eating a banana and cheese sandwich :-D
I'd run with a theme like "I don't Understand Grown Ups". Kinda matches the photo and leaves it open for comments about a lot of questionable dumb behavior we observe. Good on you for proposing a new meme template. I've just tried to do the same: