Put him on a leash and take him out for a walk...

You could start by requesting further information about his expertise in some funny way. For instance say that you need a wine expert and ask him some detailed questions that require elaborate answers and subjective judgement. Then you can ask if he could acquire some rare wines for you. Maybe ask if he is willing to travel somewhere to inspect that the wine farmers don't have outhouses in the immediate vicinity of the grapevines.