The War against Byakuran had been desperate, and the backlash against something he tried had thrown him back in time. He made a plan, but ...

For the prompt, "Zevran thought he would have to teach Alistair the finer points of lovemaking. Imagine Zevran's surprise when Alistair ravished him their first night. He would never underestimate Alistair or a warden's stamina again." Because it pretty much wrote itself.