My wife and I have been married for more than thirty years. We've both in our early fifties. We've always enjoyed our sex life, but recently, it's got a little twitchy, with me wanting one thing and my wife another, and an increasing difference in the frequency of our desire for lovemaking.
We've tried a lot of different approaches to get things back on an even keel. One of the best is the Coital Alignment Technique (similar to 'grinding the corn'), which is great for producing a gentle build up of sexual friction and an explosive, whole body, usually simultaneous orgasm. The trouble is, it's hard to keep from speeding up and getting over frantic towards the end.