certainly one's chest under a shirt and jacket are and many people apply fragrance there - to no detriment ?
I can think of many times I've carried the same spray vial in a breast pocket of jackets for instance, on a 2 week business trip - and fair enough, while the jackets were hung up the sample was back down to room temperature - but it did spend a good 10 hours a day at jacket lining temperature which I would imagine floats between 30-36c. 2 weeks later thats 100 hours @ the temperature in question.
again to no detriment?
doesn't meant to say I don't believe that certain temperatures may become ruinous to fragrances but my guess is that it's not under 40c for the periods of time we're talking about (ie: I'm sure knaqsim wasn't keeping his samples heated for 4 years) 4 years in an attic over 30c I'd give no guarantees of course, but we are talking a matter of weeks at most for the purposes of a rapid maturation technique