Guys, What makes a good listener, in your opinion?

I want to be a better listener to my man, especially when he needs to vent about work pressures. It seems to me that a man may want a different type of listening than my female friends. For example, my best friend and I kind of talk at the same time sometimes, or ask clarification questions as we go, and it's not a problem. However, it seems to frustrate him if I do this, and the last thing I want is to add frustration. Help me become a better listener, guys! Thanks!
Guys, What makes a good listener, in your opinion?
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