I was dating someone 19 years younger than me late last year (I was 49). A few years ago I dated a few women just a few years younger than me, but I've no golden rule.
I do like to keep active everyday and I'm young at heart for sure....
First time I'd dated in a few years and really enjoyed it.
She was lovely but I felt this sense of loss in this life I currently have (that freedom).
Whether that's a permanent thing I'm not sure, but being with someone at that time felt off for me.
But then again, maybe she just wasn't right for me.
I've tried 'the market' again recently and can't pull for toffee (admittedly this is online). So fuck knows. Monks life for me for the forseeable.