@YellowBun Dd was 12 and older. The city was Hull but it happened elsewhere. Not in central London though.
France: Paris and the arse end of nowhere in Normandy
Italy: Rome, Sicily, trains between cities. Rome is the worst, a totally different experience if you are accompanied by a man to when you are by yourself. It was worse than Marrakesh, where although I got hassle, it wasn’t sexual hassle. Istanbul was also fine.
In Sicily I went out for a walk in the day for some reason, leaving my Dd with her dad back at the hotel and it was bizarre, men leaned out of cars and hissed which I didn’t know was a thing.
I think if you are a man or if you drive everywhere or tend to go out in a mixed group or with a male partner then you don’t see it. I like to walk and use public transport where possible rather than use a car.
Lots of friends of mine in the U.K. get catcalled and insulted when they go for a run. It’s not at all rare unfortunately. My daughter has large breasts and when she was training for a marathon three years ago she got comments shouted all the time but not if her husband went out with her.