Just an anecdote as you reminded me of my trip to MP.
I spend some periods in my life smoking. I know it is a bad habit, but I think of it as the salt of Life. It is healthier to go without, but it tops off an otherwise good moment, into something spectacular.
When I was going to MP, I knew from research that I just had to go up Huayna. I hadn't been smoking for years but knew that moment getting to the top would be a rare moment in life, so a couple of weeks before the trip I took up the habit again.
On the day, I made it into the first group with Huayna access, and being very fit at the time, I was sure I would be the first person to get to the top.
The entire MP area is smoke-free, which I respected, but I took a single Marlboro for that moment at the Huayna top. I thought I had left everybody way behind, but when I got to the peak of Huayna, where you clamber through some huge boulders to get to the very highest point, I immerged to find a lovely young lady had managed to just beat me!
There was no way I would contaminate her moment with a smoke, so I waited patiently as she admired the view. After about 15 minutes of us just sitting there, I finally confessed to her that I was waiting for her to go so I could enjoy my moment with my Marlboro. She looked at me at said she was doing the exact same thing!
We naughtily lit our smokes and had a moment of absolute magic.
She was a doctor from South Africa. You meet the most amazing people at MP.