A:AnswerYes you can and yes they are sweat proof. I’ve used them to jog and play soccer. Just be aware that they are noise canceling so will be difficult to communicate with teammates.
A:AnswerEverything starts out white because it’s the cheapest to manufacture. And, it helps them mitigate their losses if it doesn’t sell as much. I did read an article on Mac Rumors that they were releasing new colors. https://www.macrumors.com/2019/10/26/airpods-pro-black-midnight-green-rumor/
A:AnswerI had purchased the black pair 6 months ago and no the b itself has no personal function. Mine seems to be only black, smooth and shiny Plastic
A:AnswerI use mine with an IPhone. They will read aloud text messages that are not too long. Siri tells me if the message is too long and can't be read otherwise it will read it out and then ask if you want to respond.