had a Honda 3 wheeler(same one that was in James bond) and absolutely burned the fuck out of my calf.

that was the last time mom let me ride it. still got a couple more rides out of it before she made dad sell it.

Similar here. I was like 10-11yo and another kid brought over a little 50cc bike. We weren't even doing anything "stupid" with it, and somehow I had a burn on my calf about the size of my palm that took a relatively long time to heal. The skin there was a different color for years afterward.

And, that was so long ago, and I've interacted with bike so little since then, I still couldn't tell you which bits get hot, just that some do so be careful.

My best friend in elementary school rode dirt bikes with his dad and bother. The first day we met he showed me a nasty scar he got from the exhaust pipe on his bike.

Burned my leg on my dad’s Honda. He picked me up from school and I happened to be wearing shorts.

I still have a piece of my eyebrow missing from when I had a little four wheeler at like 5 years old. I somehow managed to find myself under the thing while riding.

A while after I was washing it and shoved the garden hose in the exhaust, and that was the end of it

Yeah looks like they're not familiar with the human crayon.

Yesterday I saw a guy riding on the interstate doing 80+ mph shirtless while lane splitting. I was amazed.

Cannonball damage actually.

The exhaust pipes are incredibly hot.

Yeah, the pillion passenger has their foot on the foot peg now, but it's previously been on the exhaust -- presumably until they felt the heat as it got a few millimeters from the sole of their foot after melting through the shoe.

If the pillion foot pegs weren't folded out when they started, and they've not been on the back of a motorcycle before, it might not have been obvious where to put their feet.

The muffler with melted plastic all over it will be the more expensive problem. Every time he goes for a ride it's gonna smell like cheap burnt shoe.

Was it explained to the passenger which bits are the correct footrest?

That's exactly what a muffler would say.

Assuming it's there and intact

The peak of that arch is probably paper thin now though. It'd be like wearing two half-shoes on one foot.

Parmesan. Same as the stuff from behind your ears. Unless you mean the shoe. Then burnt shoe.