Step 3: Dry Off
Well, unless his boxers are full of dry ice, obviously, but it's a good rule of thumb. Before going to bed, make sure you're dry. If you just got done hiking, you could be covered in sweat, or if you washed your face before bed, you might be wet as well, though admittedly cleaner. Do what you can to get dry. If your clothes are damp, switch into a dry set.