It has a politeness checker, where if you don't have enough PLEASEs in the program, it will refuse to run.
Madness string 2379
I want to be extremely clear about this: I never don't want pictures of you dog. It is never a bad or inappropriate time for dog pics. I will never be displeased by receiving a dog pic. At no point in my life will I ever be like 'No thank you, I don't want dog pics right now'.