1- It is not lady like to straddle a water jet, moan in ecstasy, then scream at the top of your lungs, "Oh yes baby!"
2- Washing your partners back is sexy. Washing your pantyhose is not!
3- Group nude bathing with strangers can be a pleasant experience, but don't spoil things by making snide remarks like "I've seen bigger wangs on Hamsters"
4- It's OK to pass a joint while tubbing. It's not OK to pass gas.
5- Don't think you're fooling anybody by trying to pass off your vibrator as a toy submarine!