En kollega på jobben sendte meg denne som jeg syntes var ganske morsom. Er på engelsk, men det går sikkert bra:

Find out who is your real friend. This really works…! If you don’t believe it, just try this experiment:

Put your dog and your spouse in the trunk of the car for an hour.
When you open the trunk, which one is really happy to see you?

(spouse=ektefelle, trunc of the car=bagasjerom)