Why are rubber sheets smoked?

Could you elaborate on the curious practice of smoking rubber sheets? I'm intrigued by this unconventional method and am wondering what the motivation behind it is. Does it serve a specific purpose, such as enhancing the material's properties or as part of a traditional cultural ritual? Additionally, I'm curious about the safety implications of this practice and whether there are any known health risks associated with smoking rubber sheets. Could you provide further details on this interesting topic?