Hashish is part of the way towards the right kind of ganja laws Only smoking female buds is basically sexist against the plants and a complete and total waste of a good male plant that can be turned into hash Ganja, Ganja, Ganja. How I miss thee!
I don't think you would get very much. Males have little to no THC, and I would be hesitant to have males anywhere near my females for fear of pollination. It can easily stick to your cloths or something and then we have a problem. I have heard of people doing it though.