Is Tungsten magnetic? I dropped my boyfriends ring (made of Tungsten) down the place in the doorframe where the door closes, not knowing there was actually a hole there.
Use commas to separate things in a list or series. If you have a series of three or more items, use commas to separate each item. Do not place commas before or after the list or series. Do not use commas when all the items in a series are linked by and, or, or nor.
I have this same problem! I totally understand why people do it, but it's still kind of tough. It's really easy to put a comma after hi when I'm following June with an exclamation mark. Then, the completeness of the sentence is evidence. But I do not always feel so spunky and, well... a colon is so formal.