Sharp objects puncturing the tire would cause tire deflation. I would assume that it's also normal for non compromised tires to lose air over time because of expansion, contraction, scientific crap, whatever.
No. Low tire pressure causes poor handling and poor tire wear.
Out of balance, bent wheel, defect in tire.
tires
I gave him a slice of specially prepared ham for his delectation.
suspension
Driving on low tire pressure flexes the tire, causes overheating and can make the tire come off the rim on corners.
Faulty construction of the tire of damage from a road hazard.
Over inflation of tire. - lower your pressures.
yes
Over inflation. Inflate the tire to the correct pressure as listed in your owner's manual and on the driver's door post.
Most likely under-inflated tire
Extreme braking and low inflation cause wear on a bike tire.