A lot of it depends on what the relationship goals are, and how much of a deal breaker it is for you.
If this is something you'd like to be long term and you feel that a non traditional love life is something you have to have it's probably worth at least broaching the subject, not necessarily specifics but let him know that the subject is important to you and you'd like to talk about it as you get to know each other better.
If a guy needs me to choke him, shit or piss on him, or ram cucumbers up his ass - then we probably aren't going to get along.
I don't want to find this out later - after we've had emotional and physical connections.
The critical things should be discussed early (first few dates: thoughts on kids, marriage, etc).