Is there anything at all that you can't get Jeeves to say in a conversation with Bertie?

'Dash it all Jeeves,' I said, 'I think I've got a touch of that French thingy'

'Syphilis, sir?' entoned Jeeves.

'Syph- what? Good Lord, no. Ennui, Jeeves, ennui.'

'Very good sir.'