The presence of males does not cause gender reversal in cannabis. Sex is determined by the presence or absence of a Y chromosome.

Males are completely useless unless you want to make seeds.

Males of exceptional strains may indeed produce resin, but so little that they are a wicked waste of space and you'd have to smoke a lot of garbage to get high. The part on females that is prime smokage is the calyxes, and males have none, so you'd have to smoke leaves... harsh and unpleasant at best.