Are you a man? Apparently there are commandments for every guy to follow, here
4.) If you've known a Man for more than 24 hours, his sister is off limits
forever, unless you actually marry her.
13.) If a Man's fly is down, that's his problem, you didn't see anything.
17.) If you compliment a Man on his six-pack, you'd better be talking about
his choice of beer.
Haha... Some pretty funny stuff that you'd better abide by. ;-)