I remember flying out over the UK to the Oceanic boundary, a couple of years ago, and a "Reach" (US military) flight was on our frequency an asked the controller if he had a Uniform, ( UHF frequency), the controller said no we don't wear uniforms ...what are you wearing? ... a flight suit , came the reply, then I had to butt in and say, well at least you don't have to dress like lion tamers like us....