I tried to wear a Buff when I was cycling earlier this year. I made it 4mi before I had to pull it off. I can't imagine doing cardio work with a legit mask.
Soccer requires them, but in soccer, you have some downtime. In basketball, you're moving almost non-stop.
This one time at family Thanksgiving, my cousins, grandparents, and parents were all playing Pictionary. Probably like, two teams of six.
My cousin, who was about 14 at the time, starts the timer and then starts drawing a woman, spread eagle, with a monster hairy vaj. Multiple arrows pointing at the vaj.
Instead of the typical uproar of guesses, he drew to an audience completely silent, until his father spoke up, "that's a vagina."
The final grain of sand in the timer fell to the bottom. My cousin: "come on guys, MUFF!"
Everyone instantly lost their shit laughing, until my brother spoke up with, "Dude, a muff is where you keep your fingers warm."
After we finished losing our shit a second time, that was the day my cousin learned that a muff is.