Deaf vs. Hearing - what to talk about, and what topics to avoid?

Deaf and Hearing people live together in the same world, but with different cultural elements. 
Some topics are okay to discuss with a deaf person, but you should avoid them with hearing people. 
Also it is true from the other side: maybe it is polite for the hearing people, but not convenient in case of deaf company.

What topics and strategies you should choose, while talking to Deaf and Hearing people? 

Here is a handy cheatsheet.
Deaf vs. Hearing topics to discuss/avoid
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