Question 2 new to this starting late.

Hi again hope you read question 1 for my background. Now I'm exploring ball jiggling to orgasm does anyone do it any tops or advice. It's only that in this lockdown i spend all day in loose swimmers in the heat so my balls are lo hanging all day. I've found the urge to jiggle them and bounce them and it feels pretty good but no erection to go with it yet mind you I'm nearly 70 so I get a boner less often lol. Any help advice or comments very welcome ?