I advise you to find a woman around 70–75 who also never liked penetration. You two would be a perfect match: you lick her, she cums, and you get off on watching her orgasm. Ideal “platonic” relationship.
But I strongly suspect you won’t do that. What you really want is a younger woman (45–55) so you can regularly have access to her cunt while pretending to be a ‘submissive man who only cares about her pleasure.’
Essentially, it’s the classic wish to get sexual service from a younger woman without offering anything meaningful in return. Because with a 72-year-old woman your own age, you’d probably lose interest in her orgasms very quickly. Yes, the kind of relationship you’re describing does exist — but almost exclusively in elderly couples who have spent decades together. They have deep trust, love, and mutual care built over a lifetime, and when penetrative sex becomes impossible for natural reasons, this kind of intimacy can still work.
But without that long shared history of trust, passion, and love, what you want is rarely sustainable. It usually becomes just one-sided exploitation.