In space, no one can hear you ... (fill in here) ...
PS How would they know and how would it be possible? Doesn't sniffing involve actual breathing?
Yeah...and isn't space REALLY low on molecules?
I suspect they speak of what space CAPSULES smell like.
That's a lot more likely to be right.
They could open a vile and then put the top back on while they are out on one of their space walks, and then bring it back inside the space station, open it and smell.
Otherwise, I think it would be pretty hard to do. Even when the one guy last year or so that was out repairing something on the space station got a tear on the sleeve of his space suit he had to get inside really quick.
If it is as stated, I don't think I would douse myself in "Space" before a date.