My 8 yo DS has just come home after spending 4 days with his dad (my XH) and announced that for Christmas his dad gave him a swiss army knife, which will be kept at his dad's. I wouldn't have allowed him to have a swiss army knife as I think he is too young and accidents can happen with knives. I think his dad is totally irresponsible and trying to buy DS affection. It is difficult to talk to XH as whenever I have an opionion that goes against his he becomes volatile. I will be terrified now every time my DS goes to stay with my XH that some knife accident will occur. Am I being unreasonable? What would you do?