The man who makes it doesn't use it; the man who buys it doesn't need it; the man who uses it doesn't know it. What is it?

Why this works

This riddle cleverly plays with the roles of different people associated with a coffin. The man who makes it (the carpenter or craftsman) creates coffins as part of his trade but doesn’t use one himself. The man who buys it (often a family member) purchases the coffin for someone else, not for his own use. Finally, the man who uses it (the deceased) is oblivious to it since he has already passed away. This intricate wordplay reveals how each person relates to the coffin in a unique way, highlighting the life cycle and the inevitability of death.