Is there an ideal age for this activity?
For many men (and a few women) we claim that BDSM was a childhood fantasy.
For women of my generation (preindustrial and in my case precambrian) most of them didn't DO anything about it until their late 30's or early 40's when the kids spent more time out of the house and they had more time to be women rather than moms.
To be fair, they also did not have internet available to them at earlier ages, and anything that was associated with "sex" in those days was in the stereotypical "dirty" (in more than one sense of the word) bookstore in the seedy part of town. Most MEN stayed away from these places and any woman who showed up within 500 feet of the premises was assumed to be selling a service.
Mrs. Mule and I used to run a home health care business. She told me about two of her patients -- lesbian lovers -- in their 80s. This was back in the 1980s -- they couldn't be lesbian lovers -- sex did not exist before 1968. It was invented by our generation. It's still a mystery how procreation happened before then.
One tends to think that old people are sexless. I admit that I used to think that way but now that I am an "old people" myself, I see that it is not so.
So what are your perceptions of geriatric kinksters?
I have found that olderman are the naughtest and they can do it all night long.