I am gonna say dont waste your time or effort, I havent heard of males being used for anything but breeding. If there isnt enough thc to get you high I am sure there isnt enough to get you high thru digestion.
you can make butter from males, or hash oil as hasbbob said. my guess is that it would be at the point where they are about to release their pollen, because after that i would assume that their life is not needed and they would prepare to die.