Oh you’re just a dirty old man!
That the voice in your head? :-)
I remember once giving a friend a piece of my mind, in front of another who just happened to be present, when he made a statement to the effect that I had issues because I liked younger men.
I met my partner when he was 24 and I was 45. We’ve been together now 7 years! And my long-term relationship before him was also a huge age difference.
Be it as friends or lovers, it doesn’t matter. My cousin, who’s my father’s age, is has been a mentor to me when I was a teenager and up until my very early 20s.
There is no right or wrong, just want brings happiness to two people, however that manifests.