Why do older people scratch the inside of their ears with their keys?
As humans age, the magnetic material upon which our memories are encoded becomes fragmented and slowly sloughs off with the most recent layers of magnetic material (an organic magnesium based compound) coming off first. This is why older people tend to be forgetful and tend to forget the most recent memories first (this is why they tend to focus on the good old days when reminiscing). These magnetic sloughings are slowly carried out of the brain case and into the inner ear canal via the process of ciliacal motility. If left unchecked, these microscopic metal filings can build up and create ulcerous irritations in the lower ear canal. The particular proportions of magnetophilic metals in common keys attract these particles and alleviate the symptoms of irritation caused by excessive build up.
Because the momment their ear itches, is the exact momment they are stuffering a brain lasp So they stick their key in their ears to see if they can 't get their brain started again. This has to be it, because if they knew just exactly how bad it was to stick your key in your ear, they would not do it. Keys are filthy dirty, and have no business in your ear. YIKES!
Because the inside of their ears itch and the keys are handy
Yes, you can have different brands of tires on the front and rear. Some combinations may exhibit dangerous handling, but that's the exception and not the norm. Shinko are well known as being pretty good value for the money, but there are looser manufacturing standards so there are some funky tires out there in the market (the odd batch here and there). Lots of people not only don't like running different brands front and rear, they want matched models of tire front and rear. But it's your call. I just do my best to avoid being in a situation where the Rear tire is more sticky than the Front. It's easy to control the rear if it loses traction, not so easy when the front does the same. Can't help with longevity as my experience is grounded mostly in sportbikes and duel sports.
If you are only getting 500 miles from your rear tire, you are doing something seriously wrong, and no tire is going to help. Since it's a VT1100, I assume you're not burning the tires off it on acceleration, unless you're doing burnouts. So you must be either downshifting too aggressively, or you're locking up the rear tire when stopping. Improve your stopping technique and your tires will last longer.