Carbon,
from rereading this thread a couple of times I am guessing you are not very familiar with plant biology.
Just to be clear.
If you have newly budding female plants growing and friend "A" walks in after bathing himself in pollen and shakes the pollen off of himself and all over your newly budding females,
the result will not be the hermaphrodization of your females.
This is without regard to the pollen being from a legitimate male or a hermaphrodite.
What will happen is that the viable pistils will be pollinated and form seed. Residual pollen can be rendered virtually infertile by misting the area of exposure a few times over a few days. However, if degradation of the pollen is not initiated artificially it can remain viable for quite some time and be the source of random seed clusters in otherwise seed free plants.
If you mist your now exposed and pollinated females and grow area down with water after the exposure, only those buds that were exposed to the initial pollen will produce seed. Those buds that form after will not produce seed if they are not exposed to viable pollen. Each pistil is capable of producing one seed, Each pistil that produces a seed must be fertilized by a piece of pollen. No pollen attaching to that pistil, no seed.
The truth of the matter is that you could very well transfer pollen to your plants yourself by incidental exposure to male pollen blowing around your neighborhood.
But the result would just be a few odd seeds.
Now if you have a plant that is a female that goes "hermaphrodite", you will most likely have a plant that starts off looking like a female and producing buds like a female, and then sometimes midway through bud production but usually towards the end, they will produce a few male flowers randomly through the various buds.
This is not really a herm. And in my experience did not result in tons of seed nor a noticeable drop in the expected effect of the cannabis.
I guess its all a learning curve :thumbs: 
