Hypothetically, I don’t have a limit st the high end, and the low end would be based more on the individual, but no younger than eighteen.

In reality, chances of finding someone in their twenties that would mesh well with for dating is unlikely, so thirty-ish is a more realistic lower age.

Upper end is less restricted for dating, but on a realistic level, I’m not going to enter a relationship with someone that’s into their seventies just because of life span probability after that.

Luckily, I’m happily married, so I don’t have to worry about that shit. But I’ve never cared about ages for dating, since dating is essentially “trying on” someone for a more committed relationship. It makes it worth interacting with people that are less likely to be compatible on a surface level, when going into it with the knowledge that it’s probably going to peter out anyway, so the risks of it having a high price are lower.

Seriously, every relationship has difficulties. You can’t predict what’s going to arise over decades of being together. So limiting options by age ends up being arbitrary. While I never went looking for people far away from my age, anyone old enough and developed enough to understand what a relationship is was the determinant.

Now, on a practical level, once you’re out in the work force, chances are that you’ll be interacting with people from their mid-to-late twenties up to their sixties. So you aren’t going to end up dating outside of that range often. To date someone you have to meet them, and communicate often enough to ask them for time outside of whatever scope you meet them in. So I never really dated outside that range at any point. But I wouldn’t have rejected the possibility if it came up.

I dunno, I just don’t see age gaps as a problem.