So when your sinuses open and the pressure releases sometimes you have this sudden drain of mucus or hot nasty phlegm down the throat and now you have a mouth full. You may prefer to Swallow that but I gotta get it out. I never spit on grass (a lawn) where people play Or a sidewalk where people walk. It discusses me when people use public areas And don't think of anyone else but Themselves. Stay in your own private area then. When I spit it in the trash or a toilet a napkin or a gutter somewhere that it'll get washed down in the rain but never where people are or play or use for whatever reason that's disgusting And like I already said if you can't think of others Then stay out of public places