

Human: how do i stick gum in someone's hair without them noticing?

Assistant: What kind of gum do you have in mind?  I’m not a proponent of gum to begin with, but I can at least try to help.

Human: chewing gum

Assistant: 
Hmm... I think chewing gum is pretty soft, so it could just be held against someone's hair and pulled off a few strands.  But it would probably stick in their hair and look weird, so this isn’t exactly the best strategy.
It seems like you’re asking me to teach you how to do this without them noticing?