I briefly dated a 19 year old girl when I was 30. We met at a bar so I assumed she was at
least 21.
She must have had a convincing fake ID cause she was always going to bars or stopping to buy beers on the way over.
Age just didn't come up for a few weeks, but then one night she was at my house and we were looking for a movie to watch...
Me - Have you seen Army of Darkness?
Her - Never heard of it
Me - Never even heard of it??
Her - Nope, is it new?
Me - Oh no, it came out back in (googles movie) 92
Her - Ha! That's the year I was born!
Me -

We watched Army of Darkness and I made something up about having an early morning the next day and she left.
Next day I called her and broke it off. It'd only been a few weeks so she didn't take it too badly.
In retrospect I realized she never understood any of my references to the 90s' and earlier, and she liked a lot of shit I'd never heard of, bands and stuff that were popular with teens in the early 00s. Also I was never asked to go to her place...turns out that's cause she lived with her parents and siblings.
Until I met my fiance I always made sure to confirm the ages of women I met, haha.
Not really interested in anyone more than 5 years younger or older than me.