The pheromones here have been tried and testing to work both on males and females. However there are specific products, like A314 and AMMO that are pretty much designed for men to use to help attract women and Instant Sexiness A or B for women to attract men. Things like IS have version for men and women I believe but CTTM Instant Honesty and Instant Openness are for both sexes.
Finding your sweet spot its very helpful in finding out if you OD or not. Check this link out to help you find out about sweet spot testing.
Pheromones are a form of non-verbal communication for humans, we all produce it naturally, now it helps whether you want to convey a specific message or not, it’s an enhancer.
As for the scent, for me it lasts 4-5 hours when it’s not too hot out, but you gotta check it with your own body chemistry.