What does it mean when a guy shares food with you?

Out of the blue the other day a coworker asked me if I would like a grape, and I so I took one, he made a joke saying that was the grape he wanted. But that was that.

Today, again, he had grapes as part of his lunch. He asked again if I wanted one, and I said yes, this time he gave me a stem of with a few grapes on it. I said thank you and went back to my desk (he sits behind me), he was on his phone speaking to someone, and when I was talking to my coworker next to me he left me his last stem of grapes.

What does it mean when a guy shares food with you?
Post Opinion