Before you poke somebody for the very first time, it's good to understand precisely what you're doing.
The confusion led to the point that many users abandoned using.
Edit, how to poke somebody that poked you on Facebook How to Poke Someone On FB: Can you still poke someone on Facebook or has Facebook removed the "poke" feature?
Hence, you shouldn't expect to see pokes from friends alone.
this will send your buddy a poke alert.