What Should You Do if Your Kids Walk in on You Having Sex?

Once upon a time, all parents and their children lived in one cave together, and later, in one-room houses, and yet they managed to have more than one child per family. So, at least we know that children can survive witnessing or overhearing their parents having sex. Of course, that doesn’t mean it’s a good thing when your kids accidentally walk in on you in the middle of the act. What should parents do when that happens? And do we have to worry that they’ll be traumatized for life by the sight?