You're no fun

Ciel has always been all work and no play ever since his parents died. After meeting him at a party Alois can't accept that Ciel rather read than talk to him.

"Your company makes toys, toys are fun! But you're just so boring. All work and no play makes Jack a dull boy!"

"All play and no work makes Jack a mere toy."

"See? No fun person knows the rest of that saying! Only old people do, so tell me have you had your prune juice today?"