Curious about cardio exercise

1. Does MFP already take into account weight when calculating calories that are in the system now?
2. How do people add/estimate calorie burn from gym classes or dvds?
3. I see that Wii Golf is on the list. I am just curious if that is on, why is stuff like kissing, making out, and &#* not on the list? Is it not exercise if you are having too much fun?