What does it mean when a man asks a woman consistently about her weekend plans?

A friend is always asking what my plans for the weekend are. Mind you, he and I live in different states and he is married, so it's not like he'll be entertaining me in anyway. But he is very curious about my plans. Why? At first, I thought nothing of it, but now I'm starting to wonder why my plans are so interesting to him.
What does it mean when a man asks a woman consistently about her weekend plans?
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