Masters and Johnson advise older guys with anorgasmia that: "You can have sex without ejaculating - keep banging her until she's had enough, then stop. Next time you might ejaculate in her, after building up more semen." (I'm paraphrasing

)
For me, this is a reasonable substitute for real sex; I enjoy the slipping 'n sliding, and she likes, for however long she wants it, the pubic bone knocking and faster penetration than what she gets when masturbating with dildos. Then, when she's had enough, she says, "Ok, I'm done." I stop, and we enjoy the closeness.
Age 79 in 2024. On testosterone replacement due to hypothalamus malfunction. (Attention depressed guys: low testosterone is a cause.) Healthy health nut but ED due to getting old. Like to keep enough cardiovascular ability to thrust for 30 min.