Yes but, with that arrangement, when the man is 35, the woman is 52; when he's 40, she's 57. Given that a 40-year-old man is easily capable of attracting a 30-year-old woman, I need say no more about that.
He may attract a younger woman but it's satisfying the needs of a younger woman, in all areas
And don't forget, when he's 65 and possibly retired, she might still be working and not ready to settle down with a pensioner.
Anyhow, I also don't believe age matters and my hubby is 4 years and 6 weeks older than me.