Hopefully horizon has something more definitive, but my intuition says that it could be similar to the same type of reaction that Demo feels with testostrone, in that the strengthened attack force would allow the process to terminate more quickly thereby reducing the suffereing.
Obviosuly this seems different than it would be with cancer, in the case of cancer, perhaps the cells are harder to reach and distinguish, but once killed, they are gone. In the case of POIS, every time we ejaculated, we initiate a whole new reaction.
Could be a drawback for us unless the process could be synthesized or at least made less costly.