It is class, self respect.
Liberals are spoiled brat children, and they get some kind of giddy childish thrill from being vulgar in public.
That is one of the reasons that Romney lost. Romney was saying you can have an adult in charge. I will build jobs and give you the ability to work and prosper.
Unfortunately, for vast segments of America this is not a winning ticket. Especially when you have the Democrats countering with, You don't have to work. I will take care of everything. I will give you everything you need.
Given the choice between voting for 'Dad' (Romney) or Spuds Mckenzie the party dog (Obama/Democrats), it is amazing how many people choose to party instead of work and build a real life.
Liberals are children. They behave, act, and think like children who 'hate' their parents. They 'hate' adults. What can you do? Everything will continue along in Liberal 'lala' land until it doesn't. And that is when crap hit the fan. That is when so many Liberals have to face real reality for the first time in their lives.