Air Humper
A disorder that causes the victim to have an undeniable need to hump anything and EVERYTHING in sight, including the air. Air Humper(s) are very self-conscience beings, and are rarely found in public. When confronted about said disorders, they become enraged, and go into a deep state of irrational denial.
At her fourth grade graduation, Gabby was overcome by her need to hump the air and could not fight the urge, exposing her "Air Humper" disorder to hundreds.

Doctor: Now Brent, lets talk about being an Air Humper in public.

Brent: DON'T CALL ME AN AIR HUMPER!!!