It’s not just the rash that’s going to hurt, it’s when he gets scrubbed down with a stiff brush to clean the raw flesh that’ll sting!
Many years ago, a friend of my then g/f picked up his g/f to give her a ride home. It was a warm sunny day, she was wearing shorts and a tee shirt on the back of his bike, when he lost control and dropped the bike! It took three people to hold him down at the hospital A&E, because he could hear her screaming as she was scrubbed clean… 
Just to add to this, on my way out to visit a friend one dark winter night, I was in a line of cars slowing up behind one that was about to turn right, when a bike overtook the line at approximately 60-70mph, in a 50 limit, just as the car started it’s turn! I got a huge adrenaline rush, and thought “fucking hell! Suicidal idiot!” About a mile further on the road makes a sudden dip below a railway line which runs at an angle with an obliquely angled short tunnel/bridge; to complicate things, there’s a narrow lane that joins right at the bridge, as the lane runs alongside the railway embankment. As I got to the bridge, there were a couple of cars stopped, hazard lights on. I stopped, hazards on, and went to see what had happened.
It wasn’t good, a couple of pensioners were sat in their car, in the dip, waiting to turn right, across the flow of oncoming traffic. The biker had impacted the front of their car, at possibly 70-80mph, leaving the bike embedded in the front of the car. I walked through the tunnel, the rider was lying the other side, I would guess fifty feet from his bike and the car he’d flown over.
I tried for a pulse in the side of his neck, I think everyone can imagine the result… 
Here’s a link to the point where he overtook me:
Google Earth Link
Here’s the approach to the bridge;
Google Earth Link
It’s not a stretch of road to drive like a fuckwit, although development on a former RAF airfield has meant a large roundabout has been built, which does slow things a bit.
