BIRTHDAY FEVER

Am sorry but my curious mind won't rest on this one . Let's just ponder this together. Haven't you wondered why people often do strange things on their birthday, some wear new clothes, new under wears, new Jewelries , new accessories , some want to visit places they haven't been before, some want to eat what they have not eaten before. Is that what birthdays are meant for? I know of some culture or let's call it religion or belief that don't celebrate birthdays , I basically don't know why they can't celebrate their existence on earth but even those celebrating it why are they all up about it ? Or is there something more to it ? Someone just wants to overspend because it's his or her birthday .
Maybe am right on it , although there's no research on it but I would like to be the first person to bring out a new term in the medical dictionary ' birthday fever' , the one you suddenly have on that special morning , the one that makes you think weird , the one that makes you think otherwise . I might be wrong you know? Maybe there isn't something like that , maybe it's just one of those days you really want to feel special about yourself that you still alive up to date. Am not convinced yet , I still think there's more to it . Share with me your thoughts on what you think and you never can tell you might be our lucky scientist and please kindly share your thought on the weird things or special things you've done on one of those birthdays of yours.