I think self-gratification is good training for getting to know your own body. I can't remember when I started, but I do it regularly. I even do it for and with my husband! I think most men really love it when you feel comfortable enough, and secure enough to spank the monkey while they watch or join you. I can't remember ever discussing it with my friends, but more power to you if you have friends who are close enough to share such intimacy!
Think about it, if you know what you like, it'll be that much easier to teach him what you like, which leads to satisfying sexual relationships.