Space smells

According to a recent report, Space (as in Outer) smells like fried steak, hot metal and welding a motorbike. But how do they know - since chances are no astronaut is likely to whip off their helmet on a space walk and take a great big whiff? No non-human noseometer either probably. No - just the good ol' fashioned sniff test of the spacesuit once astronauts are back on board. I suppose it could be enough to make you scream - although would anyone hear you - if you were a vegetarian. But has the smell of space changed over the years as more stuff gets s(c)ent up there, and if there is no oxygen and/or wind do smells, once generated, stay in the same "spot" in geo-synchronous orbit with Earth? And were they male or female astronauts reporting the smell of space - and could gender affect the olfactory result? And will mere (as in not-cashed-up) mortals ever know? I ask because word from the latest space joyrider (? Charles Simonyi) is that people with the big bucks and the passion will still pay to go to space - whatever the price. If so - no doubt they will be able to smell for themselves!