Ha! I bet that subject line got your attention!
Yesterday a co-worker asked if I'd help him move a friend's motorcycle from his garage to his friend's garage. The friend has been in Afghanistan for the past year, and my co-worker has been storing his Yamaha YZ-something 600cc sport bike in his garage.
As my RT-P is a single-seater, we took his Triumph Daytona 600. I'm a 220# guy, and getting up and on the back of the Triumph was quite the scene. I called it "stadium seating", as I sat a full foot higher up than my co-worker. We rode the 10 miles to his place, where I got on the Yamaha and rode it another 10 miles to his friend's place. Then he asked if I'd like to drive his Triumph, as he'd never ridden on the back of his own bike.
Now two-up on a sport bike isn't the way to evaluate a sport bike, and we did make it safely back to the office, but I missed my RT at every opportunity.
Afterwards, I joked that I needed to go test-ride a Harley or a Buell, and then a Ducati, and I would have ridden bikes from all major bike manufacturing countries/companies - my German BMW, his British Triumph, his buddy's Japanese Yamaha, and then the American bikes.
After riding two bikes not my own, I was grateful to ride my RT home.