Well technically it is not the main character himself who calls the ghost(s), but that's a technicality right? And some things should better stay in the past - like past girlfriends/wives and whatever happened to them and whatever they did.
But this black and white comedy is quite interesting - and talky to say the least. Neat effects if you consider from when this is. Comdedy works too - give it a chance if you are in to weird comedies.