I find this thread interesting because there is a prominent jewelry store in town whose owner has the same last name as me. I bought my wife's engagement and wedding ring there and several years later I took it back there to replace a stone that came off of it. I got a call from the owner telling me that because we have the same last name the stone would be replaced free of charge. Needless to say we always use his store for major jewelry purchases and services.
I most recently talked to him a few months ago when I had my wedding band and 10 year anniversary band resized. I can't bring myself to ask him but I always wondered if in the back of his mind he is wondering if we may be related. Lol
Life is kinda short. Do you care or are you just intrigued by the possibility? If you really care to know, it might be worthwhile to look into it. You could either have a genealogist do it, or even check out one of those websites like Legacy.com. If you're just intrigued, then there's probably no need to go through all that.

Years ago, my former pastor's brother (who is a historian) researched their family tree. He actually found their living relatives in Africa, and plenty of the descendants of ancestors who were brought to the US on slave ships from Africa.
A couple of months ago, a girl on FB contacted me trying to figure out if we were related. I felt bad for her because she really cared and I really didn't. I'm not really into stuff like that, and plus, my last name is not that uncommon so I can't be related to them all. LOL