DS is 9, in year 4. He's a real chatterbox and we talk a lot, about anything. He occasionally asks me is THIS WORD a swear word - he spells out the offending word in question. Today he asked me is G-I-T a swear word... then he asked me is 'the c word' a swear word, not the s-h-I-t word, the other c word... c-u-n-t. I was so upset but I didn't show it. I explained to him that it was a very bad word not to be used ever, and I asked where he'd heard it. From his best friend and other boys at school. Aibu to be very upset with this?