My favorite:
8. It's best not to assume that the person closest to you has any control over their digestive function.
A lot of it also applies to having pets. Especially:
6. Probably 80% of the stains on the furniture contain DNA.
I could add some of my own:
- There is usually someone running around naked (not naming any names).
- There is a lot of loud (bad) music and (worse) dancing.
- At any given time someone is using poor judgment.
- Toilet paper everywhere!
- Poor personal hygiene.
- Screaming!
- Crazy hats! (that was just one party I remember, in particular....)
- The drooling....