Now that you mention it, yesss I see lots of them on harleys!!! It's amazing that you ride! I can honestly say I've never seen a fit girl on a harley though. Way to cut through the butter masses.  HDs can really handle the heavy loads. How do these globs fit so snugly leaning back on the passenger seats?  I can't even.   My dude drives a ducati and I'd love to watch a butterbeast just try and balance on the teeny slab of a back seat it has.