> I think if someone "got your nose open", they'd be making you mad enough to > flare your nostrils.
I've always thought it was a little more specific than that. Kind of like the line in "The Rose" about her man coming home with the smell of another woman on him, and Bette Midler says "I can smell another woman from 20 paces". If your woman has your nose open ... it's like keeping your eyes open for trouble, only in the olfactory sense.
BTW, I'm not just talking perfume here. There's an old saying that smell is 70% of sex, and many an unfaithful partner has been caught out that way.