Remember the Mach 20 (~15,000 MPH) unmanned jet the pentagon was testing to carry out its dirty little conspiracies? And remember how it lost communication part way through its flight? Well it turns out that was because its skin tore off and it crashed down into the Pacific because it was going so fast that outside friction was heating the jet's exterior to ~3,500-degrees Fahrenheit (1,925 C). I'm gonna be honest, my skin probably wouldn't last long at those temperatures either. Because one time I got into a hot tub that was only like 120-degrees and I thought I was gonna die. Then I had two wine coolers and I was all, "Whee! I'm gonna take my top off!"
Thanks to Bryan, who likes his supersonic jets the same way he likes his pudding: with no skin on top.