No offense, Papa Bear, (and I may be limited in my experience) but at 70+ no women my age is that interested in a love life; gardens, yes; pets, yes; grand kids, yes; sex? NO!
If they can get a man without sex, then perhaps they would prefer it. If the only way to keep a man interested in having them around is via sex, then that might change their attitude.
I'm pretty sure that Donald Trump has a sex life with Melania. Anthony Quinn managed to father a couple of kids, one at age 78, and another at 82, with his girlfriend (who was 33 when she had the younger kid).
The mother of Clint Eastwood's youngest daughter was 28 (and he was 63) when she had the kid. He later married her and stayed with her for 18 years.