J.D.
I think that this is pretty normal for their age, and will probably continue for a while. I also think the more they get a rise out of you and dad, the more they're going to do it. All of my kids do this and the only thing I have found that I find works for me is this: we had the discussion about when it is and isn't appropriate to discuss things we do and see in the bathroom-ie; they're HAVING diarrhea, trouble pooping, owies on the privates, etc., anything else is 'potty talk' and I don't want to hear it, they can talk that way but only in their rooms...for some reason it's not as fun when they're 'allowed'. Sometimes they 'forget' and I'll just remind them to take that potty talk to their room because we don't want it around us.