Mystery #1: the best smelling stairwell ever

The concrete stairwell in my parking garage always smells like perfume, really awesome perfume. Always, the same perfume every day.  I’m not complaining, perfume is much enjoyable then other city smells I can think of.  But its killing me, I want to know what perfume it is, and WHO keeps spraying it in the stairwell (or wearing too much so that it has that intense staying power)? I’m sure I will never know.