If you have high reputation with werewolves, there is a chance it wont attack you or use normal attacks, but it is a chance only. In my build I use gears that rise charm and lewdness, so 3 or 4 pants down and it's done. Anyway be prepared with health potions, soap and well rested for bonuses. Barrel has a harness if you did encounters with him. Rose sells gears that rise those stats, too. You can submit to alpha at high libido to get exp and reputation, enough for lvling.
At top i said mist potions and lust potions. So when it wakes up drops your pants and then you go. At more lvls just use your body as a weapon.