Some rules for guys:
Don't get tattoos on your neck
Don't wear sports jersey's, unless you are AT the game, after 30 years old
Do not get drunk on the first date
You may flatulate in front of a woman only after you have brought her to climax. If you trap her head under the covers for the purpose of flatulent entertainment, she's officially your girlfriend.
If you've known a guy for more than 24 hours, his sister is off limits forever, unless you actually marry her.
It is permissible to quaff a fruity chick drink only when you're sunning on a tropical beach....and it's delivered by a topless supermodel...and it's free.
Friends don't let friends wear Speedos. Ever. Issue closed.