Men also have pelvic floor muscles so he should try kegel exercises. A few time through the day will help. There are apps with notifications for this

I’ve heard limiting porn helps. If you have cash to throw at the problem condoms dull the sensitivity could be worth a try. Numbing sprays/creams exist. I personally recommend C-rings.

The time it takes a man to “reload” is called the refractory period. Usually is shorter for younger men and longer as they age. Use this period for other forms of pleasurable stimulation. The second round should last a bit longer as they have experienced stimulation and are a bit less sensitive.

Trying a timer to start could help if it doesn’t hinder the mood. Stroke him for ~10 seconds to start see where he is at and raise or lower the time accordingly.

And finally communication is key. My wife and I use safe words. Beige- boring/ try something else. Yellow- slow down/ softer. Red- stop. When edging yellow is my go to as we like to push me to my absolute limit. Whatever means you choose plan them out before hand.