All the culrural events might not have obivious resons. If you wanna reason for cultural events, a lot of things do not make sense in pure scientific terms. For example 1. What is the reason to celebrate New Year ? Why is new year day anything different that any ordinary day ? 2. Why do sradha for dead parents ? They are already dead and there is now way they are gonna get the cow you give to a pandit. It is the pundit who is gonna get. There are so many things that do not have scientific reasons to do it. I believe the only reson you should do it if it makes you feel good and it brings some value to yourself, sociery and people surrounding you. So if teej brings some happiness in woman, absolutely no harm celebrating. Please do not politicize Teej as a context to bash man........... Thanks