Now I don't swear a lot, but sometimes littl'un riles me to here and back and the odd oath slips out. Then he started saying it too, which was BAAD! So we told him it was a bad word and not to say it anymore. So now, if I accidentally swear when he's in earshot he comes up to me and smugly says "Mummy, now you know you aren't supposed to say that!".
35 years old and I can't even bloody swear in my own house! Even if he's at the other end of the garden his bat ears pick up everything, and within seconds he is telling me off!