WOW! Now that is impressive! I have a keen sense of smell but I can only tell if the person eats a health diet or eats junk and processed food, takes lots of meds or diabetic. On occasion I have known when women are having their period but I've found it disgusting. Also some senior women having issues down there (I worked in healthcare). And about a handful of times I've smelt a guys foreskin while still clothed towards the end of his day.