I've just read through the six pages of this thread with interest!
I'm sure you do get more whiffy with age. Just think how elderly ladies smell (over and under the talc and palma violets).
When I was working in an office, every time I got up from my chair I noticed a funny smell - it wasn't horrible exactly, just "telling". Quite embarrassing really.
OH agrees that I do sometimes smell under one armpit only (how odd!). Anti-p does help but I don't find I need to use it every day.
However, I do think that we are a bit obsessed with it all and use far more perfumed stuff than we should on our privates. And that is probably making the problem worse cos the body is trying to get rid of it!