Well, we might examine a historical precedent. Abraham Lincoln was once asked, "How long should a man's penis be?" and he famously replied, "Long enough to reach the ground." Presumably he was talking about guys standing up. So I guess guys were, like, really well hung back then or something.
So, by the same token, normal guys should have enough fragrances to reach the ground. If you live on a high-numbered floor in a tall building, and stacked them all up, that could be like thousands.
So there. Don't ask this question again.