As for underwear, wearing nei pants mainly depends on your own preferences and habits. When the activity intensity is high, if you are worried about skin irritation or external environmental impact caused by friction, you can choose to wear protective gear or underwear built in shorts, or you can directly wear underwear with good air permeability. However, in normal life, in the absence of special needs, nei pants are generally not needed.
It should be noted that it is very important for men of any age to maintain personal hygiene. They should wash their bodies every day and change their clean underwear in time.