He picked his nose
Blowing your nose in a sink can be considered bad manners because it is not a designated area for nasal hygiene. It is more appropriate to use a tissue or handkerchief to blow your nose and dispose of it properly.
blowing your nose
Some most disgusting habits include nose picking, farting, burping, clipping toenails, drooling, leaving beard shavings in sink, public scratching, smoking, peeing on the toilet seat, and talking with your mouth full.
You can try it and check.
There are more germs already in the sink, but it is a disgusting habit. If you scrub your sink with cleansers regularly, you'll lessen the germ count.
If you inhale and the smoke reaches lungs then it gets eventually to your brain , so the answer is yes you will get high by blowing it in your nose
Blowing nose while eating
because it's rude and disgusting
Nose bleeds are caused by heat, you blowing your nose too hard, or injured vessels in the nose.
Obviously you have a cold if you are constantly blowing or you have something spicy or you are crying
Simply put: Yes. By blowing your nose or "spitting out" phlegm, you are removing the substance that is clogging up your airway.