I had posted in this thread two years ago when I was 58. I will be 60 soon and still find I need more stimulation than just the hand alone (though it does still work if I need it to). Basically I use a couple of toys together that work rather well for me. While I can still get a standalone erection, BP meds at times still cause some issues.
First I put on an AliExpress Oxballs Cocksling 2 clone similar to this one:
https://www.aliexpress.com/item/3256802777128276.html
or this one:
https://thepleasurechest.com/oxballs-cocksling-2
It helps keep a firm erection and also keeps the testicles and scrotum nice and tight. That sets them up for the Oxballs Sacksling clone with Estim electrodes:
https://www.aliexpress.com/item/32825306801.html
This is the original model:
https://shop.oxballs.com/SACKSLING-2-REDESIGNED-BALLSACK-SLING-OX-3017.htm
At that point I will apply some mild Estim and it feels like my scrotum and testicles are being gently tickled. I occasionally have to increase the intensity a bit as I become a bit used to the stimulation.
I may stroke my shaft for a while but eventually I want to go further. I take a clear penis sheath purchased from AliExpress, add some lube and slip it on:
https://www.aliexpress.com/item/4000150285696.html
(I prefer the second one from the left in the picture)
I then take a Hitachi Magic Wand and rub it up and down on the sheath. The sheath transmits the vibrations all over my erection and eventually I just have a mind blowing release from the intense stimulation from both my scrotum and penis. Sometimes for even more fun, I add a vibrating inflatable butt plug.