DW and I are late 50s and our physical intimacy has never been better. But GUG has noted something extremely important - it is the quality of your overall relational intimacy that will be the most significant governing factor.
DW and I will be empty-nesters next month due to a move interstate. We are moving in order to make our 29 yr old move out (j/k). Seriously, though, I have landed my dream job, but it requires a move interstate. We will initially be living with my sister in a big house with a pool. She is an academic who is overseas half of the time.......
We can't wait. DW is 59 and I am 55. DW is a nurse, so is in a stressful and demanding job. We are really looking forwards to the lack of stress (on her part) and the increased amount of time together - my new job is 1/2 time!!! - (on my part) and we intend to really make the most of it.
But - and this is the important bit - this is only possible because our relationship now is probably better than it has ever been. We have been married for 33 years. Sure, in our 20's and 30's the orgasms may have been more intense, but they weren't the deep expression of love that they are now. It is truly mind-blowing. Schnarch is right - we are having the best sex of our lives, and that is ONLY because of the quality of our relationship.