Not strange at all, just personal preference. There are a few threads on age limits, upper and lower; worth checking them out
I meant it's a strange cut off. 21 maybe, 25 even... but I'm in my late 20s and me and the people I know my age certainly don't behave like teenagers or anything. We have careers, mortgages, wives, kids. I suspect Gabriella is a fair bit older than the 29 she claims if she has this view.