Is This A Black Motorcycle Thing And I Just Can't Understand?

Why does it seem as though a good number of black motorcyclists have stretched-out bikes? It's usually on crotch rockets, but I just saw a very long and low cruiser, which had obviously been stretched out.

And they are always black guys riding these things. In fact, I think I see more black guys (no black women so far) with that are stretched than black guys on non-stretched bikes.

Is there an advantage to this? Or is it just aesthetics? I'm not getting it.

Anyone have anything to add?