To be fair, it's not quite as simple as that - people have varied sex drives. In my own marriage, we've both definitely experienced ebbs and flows when it comes to that. Some of it is external reasons, and some of it is biological - stress can kill a sex drive, and welcoming a baby to the house almost always results in celibacy for months, if not longer, for multiple reasons.

But in general, yeah, this is good advice (for both partners, of any gender.) As my grandfather-in-law said, "Happy wife, happy life."