It is skin. [Simple enough. But he can't exactly leave it there.] It was my sister's, an implant - created for her, si? She changes often, and this is a part of what Papa's company does. This one, it...did not take. So I bought it from her, and now... [He gestures to the mask. He knows he's not omitting a lot of facts here - that this is the only face he's come by so innocently, for example - but omission of truth is a world away from lying, in his opinion.]