The good old-fashioned missionary position can lead to mind-blowing sex with the simple addition of a pillow. This sex position with a twist is incredibly easy and virtually guarantees orgasm; possibly even for both of you at the same time. Lay your woman down on her back and slide a pillow under her backside. Spread her thighs apart and place her feet flat against the mattress. Penetration from this angle will be deeper than ever before, and the unavoidable clitoral stimulation will make her orgasm deliciously intense.