I've burned my arms washing my bike. After I rinse it off I turn on so the engine heat can evaporate any standing water which of course heats up the headers...
Right after the washing I start waxing and more then once I've laid my arm across the headers while waxing the front mudguard. It doesn't happen anymore since I wrapped my headers, with em wrapped you can touch em and have enough time to pull away before it leaves a mark.

Let my dying thought be that every mile was fun and let my tombstone read,"They never made one fast enough for me."