Yesterday my mate popped round for a brew on his P 125 he arrived in short sleeved shirt and shorts and deck shoes both my wife and I told him he needed to cover up but he was adamant that it was too hot. In the afternoon I went for a pretty good ride to the Trafford centre (mall) about a 40 mile ride I must have seen a dozen or more riders all in shorts and tees riding motorbikes and scooters, I know it's hot but even coming off at 20 mph is going to cause really bad skin abrasion.
Just because it is hot dont forget to wear good protective gear.
Mark
