I hear ya, Jess.<quoted text>
Encourage?! They do it! Either I tell them no, which makes it seem like they are doing something bad or dirty and gives them a complex, or I tell them not to do it in front of people.
I have a 4 year old and a 7 year old.
We have a similar problem with Nunu and because she is such a mischievious little girl, the more we make a big deal about something, the more likely it is that she will do it. She likes the attention, good or bad. I don't try and tell her what she can do while she's in the tub in private, but once I come in to bathe her, I will tell her to stop. She's about over this phase anyway, thank goodness.