"I just don't expect a great birthday cake on my birtday from a friend I know she is not able to bake cakes!"- Katrijn Creemers' answer on with friendship if you see through everybody as a psychologist.
I said this to my Algebra Teacher once, she did not get it. That's okay, I didn't get Algebra either. My Geometry teacher had a far better sense of humor. Algebra never make sense until after I took Geometry any way.