H.J.
I don't think you are rushing things at all by talking about this. I started with my six year old VERY early about how to wipe. We even made up a song about it so she would remember the "front to back" routine for wiping when going pee pee. As for the other situation, obviously its better to go from the back. Thats super hard to learn. You just have to keep supervising and practicing with them. With the girls its so important to get this down to avoid infection and such. Once your little one starts preschool or kindergarten you are not around and its good to have allready laid down the good practice before then! Good Luck!