This. We are still guys, after all, and prone to be being aggressive like any other guy. My friends always get a little stunned whenever I drop an 'F' bomb. They're like, "Dude...you cussed! I've never heard you swear!" and I'm always like, "Really? I swear all the time. You clearly don't hang around me very much."
This of course only spurs me though to watch my language when out and about in public
Also, if you cross me in someway that violates a principal or something that consider I very important, then I can get
really nasty at the drop of a hat. Honestly, while I like that we're so often thought of as being really nice people, the stereotype can get on my nerves sometimes. I've said this before, but while ISFJs are good people, we're hardly angels.