Bleeding Forks
Bleeding your forks should be just as frequent as checking tire pressure. Pressure build up can cause unwanted harshness and lack of front end traction. Forks should always be bled when the bike is on a center stand and the forks are cold, so generally before the first ride. Air pressure builds up from internal heat created while riding as well as changes in elevation. Going to a track at higher elevation will build pressure but can also build a vacuum when going down in elevation.
Forks should always be bled when the fork is fully extended, front wheel off the ground, on a center stand. Forks should also be bled when the fork is cold, so generally before the first ride.
Air forks also have a bleed screw that also needs to be bled. They do generate some heat due to friction. If there is a very excessive amount of air being released from the air side that can also be an indicator that the air shaft seal is leaking internally and needs to be replaced.
Failed air shaft seal with oil in the air cartridge