Uh...actually, it's more than three -- I have several others already. The ones I already have are mostly for daily wear, these are for special occasions. Not, break-out-the-30-year-old-vintage special occasion, just a when-I-feel-like-it special occasion. I doubt I'd wear them to a metal show or industrial show or anything like that (read: biker bar) -- not because I'm worried about how I'm perceived, but because I'm afraid I'd mess them up. They were limited, so I wanted to get them before they ran out. (At least, the two black ones are limited. They're constantly changing styles anyway, so it wouldn't surprise me if they discontinued the purple one, too.) So, to synopsize: one word answer -- choice.
And thanks hungrych; obviously, other than me, you are.