To put others before yourself. As I have stated, I have no problems with what people do as long as they do not harm others. There is a thing called discretion however. We are talking about our children. Sure, they all talk and plenty of them know what sex is. You should not provide them with a highway of smut to distort their views about what sex really is. It is not some distant cold means of gratifying oneself (if you think it is, I would find it hard to belive that you would ever have a fullfilling mutual relationship with anyone of the opposite sex). That is precisely what porn portrays. We don't need to guarantee access to that in a public setting.