I have a question about port that maybe some of you more experienced port drinkers could answer. A buddy gave me a bottle of port as a birthday gift. I have been hesitant to open it because my wife isn't a big drinker and I was under the impression that it was like wine in that it shouldn't sit around for too long after opening even if it is re-corked. Is port more like a spirit in that it can be resealed and live on, or more like wine and really should be finished within a few days after opening?

Thanks,

Mark