Back to the warmup thing
Just my 2 cents, and I am no longer the expert, but I’ve always felt that the blood circulating to your penis provides not only the heat you need, but also the nutrients and oxygen your cells need.
I’ve tried hot wraps but I just don’t see the need (do you wrap your arms in hot towels before doing bench presses?). Obviously if it’s so cold you’re turtled and your balls are hiding somewhere behind your navel, you’ll want to warm things up howeever you can.
I had success with weights with no warmup, whatsoever, ever. Kegeling is key.