You hear the door open as you ponder what to do with the latex and freeze on the spot.
"Hey buddy, I was just- WOAH! I mean... uh... you know, I just didn't think you were into... um, I'd better go now..."
Oh crap, he thinks you're wearing costume parts! Just the thought of him looking at you with that in his mind is almost enough to paralyze you with humiliation... until you hear him leaving.
"NO, WAIT!" you shout, hoping to stop him from leaving before you've explained the situation. Luckily, when you turn around you see that he's willing to stay for now.
After a few minutes, you've explained the night's events to him. The werewolf, the puddles, the ass and feet, everything. He doesn't seem to believe all of it at first, but after some experimental tugging he finds that the latex chunks are definitely stuck tightly enough to back up your far-fetched story.
"I'm not sure I really believe all of this... but I guess it kinda makes sense. I mean, evil latex is weird, but you wearing some funky rabbit costume is weirder. Now, about dealing with it... well, you said turpentine just made it worse, so I guess we can't use like that. Uh... I guess we could try cutting it. I mean, worst that could happen is I nick your ass a couple of times, right?"
By now you doubt that's the worst that could happen, but he doesn't seem even slightly worried as he digs through your cutlery for the biggest, sharpest knife he can find.
"All right," he says as he slowly brings the knife to your butt, "just stay still and I'll try not to cut you."