Me too (don't really swear and wouldn't on here).
In the office where I work many of the women eff and blind from morning till night, but the men don't! QI.
Also, I'm fascinated to learn that the eff word "... at one time it was the standard word for the activity it described, used by everyone from royalty to nuns to ploughmen". I never knew that, and I grumble when they use it in the historical dramas on telly, saying 'People didn't speak like that back then'. But, come to think of it, it is still used incorrectly in those dramas then, because it is often used in the 'modern' sense rather than as described above.
I agree with you harri I mostly find it jarring.