If you can get it up for a grey haired old lady, you are wasting a great opportunity as a paid gigolo. Rich ladies pay to find guys like you particularly if you seem to be enjoying it !
I 2nd, the suggestion, get two beautiful 30's semi cougars for double fun and double enjoyment, then getting just one of 60 yrs with very little sexual desire or she may not even get moist or wet Lol!
Sooner than we think, this will be not impossible to find, 60+ SPs. Already middle aged chinese SPs are operating in the GTA, claiming to be in their 3Os, but are in there late 50's.