Stake It to the Limit

In season seven of BtVS. Willow uses the power of the scythe, to give every girl the slayer power, but what if in doing so, it screwed up the line Forever. Like instead of One girl in all the world, what if it became, One boy in all the world. So I am answering the time old question...What if guys could be slayers? This is in a AU, taking place right after the events of Season 7.