What does it mean when a guy wears cologne?

What does it mean when you tell a guy you like him and then he starts to wear cologne and he's never worn it before?
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He's a quiet guy. I think he likes me. He likes me talking to him. The first time I told him I liked him he wore it. We work together. When we had a disagreement, he didn't wear it. When I reassured him I still liked him, he wore it again.
What does it mean when a guy wears cologne?
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