Because when you're in your 50s and 60s, it's pathetic to "open sets" and "trying out a new opener".
There's a bar 6 minutes within walking distance where i live; I go there frequently in the summer time cause it's some volleyball tourney's going on and there some cute gals. Anyway one of the regulars is an 83-year-old guy by the name of Floyd. Floyd hits on all the girls doesn't matter if they are in their 20s or in their 70s.
Long story Floyd has gotton a couple of HJ's from women in their 50s at the bar, one woman even took him home. He was a sugar daddy for a while for some woman in her 30s.