Is it normal to cuss all the time in your head, but never cuss aloud?

I'm the same way. On the outside I'm always sweet and rarely ever swear, but my inner dialogue is downright nasty. Whenever I try to talk like the way I think, people always say "Don't do that! It's too out-of-character for you."

Yeah I'm the same way. Sometimes I yell and cuss when no ones around. Hah.

You display fantastic self control!

Well done you!

Oh, if you want to get a funny reaction from people then let one slip every once in a while. Only do this to someone you are good friends with though. They will be like ":O I didn't know you cussed!" But don't get into a bad habit of doing it all the time though; keep your composure.

I think so.
You can actually say anything you like in your head.

Morning how are you today?
Fine (you damn f'ing bastard, I wish I could kill you)
Anyway, see you later xoxo

lol. it's like me!

classmate: hey! how's your day?
me: (damn you. get out of my way you bastard. you're ruining my f***ing way!) it's wonderful! thank you for asking!

it's really hilarious!