Here, I'll give you a class in all you'll ever need to know (everything else is just flash).
There are only THREE rules you'll ever need to know ....
Rule #1 .... Air goes in and out. Blood goes round and round. Any deviation from the two, fix it.
Rule #2 .... If it's wet, sticky, and not yours, don't touch it.
Rule #3 .... You can't fix stupid.
Class dismissed.
