Test it on George

It was the safest option, and the one you would feel the least immoral about. George tried to steal another person's life so it was only fair you dawned his for a moment. Right?

You shake yourself. The thought of wearing the middle aged man gave you the chills, but your curiosity was too great. You lay the neighbor's skin aside and lift the intruder. Did you have to be naked to wear these? George seemed to have gotten naked to become a woman, and you didn't really want to risk anything unplanned happening to you, so you follow his steps. You carefully fold you clothes on the bed, and with one last deep breath, you start to dawn the skin of the gruffy guy who got you into this mess in the first place.

George was physically larger than you. Both taller, and more overweight. Yet just like how he somehow managed to fit inside the significantly smaller skin of your neighbor, you somehow managed to fill his much larger one. You pulled the skin up to your crotch and stared in a bit of a shock at your longer and thicker legs. It was all so bizarre...

You decide not to linger in it for too long and continue pulling the skin up. You cringe a little feeling his body hair on the deflated husk as you pull it on, but you go along with it nevertheless. And with one last tug on your face, here you were. The image of the naked supposedly homeless man replacing yours in the mirror.

You stared at yourself for a long moment. Everything felt different. Your hands were thicker, your body stiffer and hairier, and your perspective was 2 inches taller. And most bizzare of all was seeing a different image in the mirror, copying your every move. "Shit..." you whisper, only to be again surprised by the aged voice coming out of your borrowed lips. It was time to find out who this man really was.

With one last gulp you lay the black pen on the bed and pick its twin. You take a deep breath, and zap yourself.