I imagine we would know if we were allowed. It is said that not even the Valar truly know. Only The One. I will not pretend to understand why it is so. We know so much else that it seems petty to withhold the information, especially when it makes men jealous of our long lives.

What is shaving? I do not think I have seen our men do that, though I suppose little would surprise me at this point. But their ears would freeze if they lacked hair entirely.