It’s a little late to ask but you can read some of his responses.

2 months ago AMA
http://www.reddit.com/r/IAmA/comments/16mq0g/iamarnold_ask_me_anything/

6 hours ago AMA
http://www.reddit.com/r/Fitness/comments/1brg0z/im_back_ama_about_fitness/

also a subreddit dedicated to Arnold
http://www.reddit.com/r/ArnoldSchwarzenegger/