Floor Riddles

A man who lives on the tenth floor takes the elevator down to the first floor every morning and goes to work. In the evening, when he comes back, on a rainy day, or if there are other people in the elevator, he goes to his floor directly. Otherwise, he goes to the seventh floor and walks up three flights of stairs to his apartment. Why?

He hated the Eiffel tower, so every day in Paris he ate on the first floor of the tower. Why did he do that?