Everybody knows how this one goes — the girl is on her back and the guy in on top. There are variations as for what you can do with the legs — wrap them around him, spread them wide, pull them closer to you, put them on his shoulders etc. But for starters, stick to what comes easy, as all variations make a difference in the angle and depth of penetration. Just do what feels right, and try and see what movements give you and him the most pleasure. This position is considered to be the one that can get most girls to orgasm , because this is where they can take care of their big O themselves!