The rule of thumb is to NEVER insult anyone but if you must really really really insult anyone at all, make sure you observe the following... let's call it Rule of Toe:

1. Only women may insult men. (Gentlemen will not insult ladies, right? Right?)
2. Only the Uglies may insult the Beauties
3. Only the poors may insult the Riches.
4. Only the Fatties may insult the Skinnies (not too sure about this though)
5. Only the Darks may insult the Lights

Ignore these rules at your own perils.

I love you all. Peace, brothers & sisters, peace.