wrote:

Women in this study noted that when they had sex when they were younger — again using the "sex as intercourse" definition — it was for their husband's sake and/or in order to procreate. Their descriptions of sex were functional and void of any discourse around pleasure.

This is unfortunately fairly common and is often due to lack of sexual education on the part of both partners. The woman doesn't show the man what pleasures her to orgasm, she might fake orgasm, and the man focuses only on his own orgasm, and perhaps believes his wife is having orgasms or is happy with it. The problem is that in the long run, if a woman does not experience great orgasms with some regularity, her interest in sex will gradually diminish, and unless there is a very deliberate change of course, she is less likely than other women to have a sexual "awakening" in later life, especially with an even further drop in libido with menopause. She's more likely to be come one of those women who's just as happy that she doesn't have to bother with sex anymore when the husband develops ED or loses interest himself.

wrote:

"We constantly want to be closer and closer. This physical closeness is so natural for us and so rewarding. It doesn't really matter if we have intercourse or not. We lie in bed and stroke each other for hours. It's the best sex I've ever had." (M, 67)

Not clear if he means they have sexual arousal and orgasms, or if it's just "closeness" and "intimacy". If it's the latter, that's not exactly inspiring. There are healthy men in their 60's who are nowhere near done with intercourse or a focus on arousal and orgasm.