I've meet up with a much older couple when I was on the road , I meet them online and had a chance to meet up with them. The night went well, had drinks and they asked me up to the room for a threesome. I had no problem. When we finally started swinging, the hubby sat on a chair in the corner and watched me make whooppie to his wife. That freaked me out at first and she informed me that it was a fantasy she wanted and I had the chance to help out with her wish. I was 36 at the time. She was in her late 50s and she was a dream to swing with.....
Age doesn't matter, if you can play in the sand box, go for it...