Just personal opinion here, but to me the goal is to get to the point of Open Communication and meeting in person. I have found that anything in the MHCS that are of a controversial nature will usually result in a close. Personally I would wait to bring sex up until you have had at least one date. If you were to meet someone "in real life" would you begin the conversation with "Hi I'm SkyKing. I like to swing from the chandeliers."

I am currently going through the process with a match who has several of the sex MHCS and then followed it up with a long dissertation of risque behavior in Second Questions. Really just not what I consider appropriate time or place.