Don't know what you've got til it's gum.

Does this happen to you?

You're chewing some gum and your friend has a spaz as soon as they notice.  "Is that GUM?  Where did you get it?!  Do you have more?!!?!?"

They've just been handed the opportunity to achieve their lifetime goal, which is to chew gum and you're possibly holding their keys to a dream come true.

It's only gum, you both know this.  Anywhere that sells anything sells gum.  Hardly an endangered food species, kids.  You can buy it at the auto parts store!  Nothing has less to do with food than the auto parts store.  What does that tell you about gum?

Hold on though, it gets complicated...  If you /do not/ have gum, you friend will practically start sobbing like you ran over their family pet.  That level of disappointment is irrational, don't you think?