Supernatural: leapfrogging

Dean

I sat folded on my bed with my head between my knees. My head had a burning, fuzzy sensation running the whole way through it, like a cranial pins and needles. I looked to my right upon hearing light footsteps in front of my full-length mirror. I was bewildered by the sight of a young woman standing stark naked in full view of the mirror, carefully inspecting every angle of her body from her long ebony locks to the tips of her toes. 

Suddenly, she looked round at me, startled by the notion of being watched. "Oh! Dean...I...it's me, Cas...You don't happen to be in possession of any women clothes, do you?"

I climb to my feet, momentarily ignoring the bizarre sensation in my newly re-adjusted brain, and stare intently at Cas, not quite sure wether to believe my eyes. "Cas?! No way..." 

"Yes way..." The girl's head tilted inquiringly, "I don't suppose you could help me at all, can you?"

Dean looked the pale body up and down, startled almost to the point where he feared he could feel vomit creeping up his throat. "Well..." He begins shakily, decidedly distracted. "First off, you'll need some underwear." He said, diving towards the lower shelves of his wardrobe. "Let me see," he said, mostly to himself as he pulled out a shoebox stashed in the very bottom. "You just might be in luck..." 

He carefully untangled the contents of the box and laid them out across his bed for Cas to see, pointing and explaining as he went, "This is called a bra, it's to cover those, and keep them in place..." He twisted to look back at Castiel's new body, hovering a vague hand above her breasts, Cas looked down with some shock, but then eventual understanding. "These, obviously, are underpants, there are different types depending on the occasion, though I'd recommend these to begin with, lets keep things simple..." He half throws an ample pair of panties back towards Castiel, and since she is very much not expecting the gesture, the undergarments don't come far off from hitting her square in the face, she lets out a strangled yelp of surprise, and just manages to catch them. "I'll give you some time to get changed...let me know when you are done." I say as I head towards the bathroom. 

I get there and slam the door, slumping against it internally screaming. "What the HELL?!"