I thought it was Bill Hicks at a glance, disappoint D:

I swear a lot, I don't have trouble toning it down when I'm in certain crowds though. My parents let me get away with it more and more when I got into my teens I guess, but I didn't swear in front of them often.

As for why swearing is bad, I think it's probably just got to do with the way language evolved over time. It is what it is.