What's with the spitting?

Ok you men - what's with the public spitting? This antisocial practice is really starting to chap my hide. The grossest thing I can imagine is walking on sidewalks and streets covered with male sputum. Didn't your mothers teach you this is a disgusting habit? You don't see women doing this so I personally know the human body can function without the public display of saliva. What's so god-awful in your mouth that you must immediately dislodge it in front of spectators, and not quietly I might add? Stop it already.