And NO you don't want other people seeing you doing it. 1 time is once tooo many. NO most girls dont do it. If your life centers around it, it is too much. No, not as much, but many do.
People have a wide range of fantasies.
That's within the bounds of normalcy. Doing it under the blanket is rude. You're just beginning. It depends on your religion. But if you don't have a religion, then it's your choice.