I'm surprised this has kicked off 
There's no way on earth a young man would have called an older man "Love", is there? Right there, that's sexist and intrusive.
In the exact scenario OP described, he wouldn't have said "Mate", either. "Hey, mate, did you see my slide & recover?" Eh? Maybe if the guy was a nine-year-old kid but, even then, to a stranger? Nah.
When Ennimead told her story, my first thought was that the kid had labelled her a Mum-alike. It makes the most sense (to me) - he'd made a bit of a prat of himself and wanted to show off? Not an obvious display of sexual attraction, but a different kind of labelling.
The fact that the two men participating in this thread don't see OP's point about entitlement is, itself, a demonstration of privilege. The bloke called a woman's attention to himself, in clear expectation of a positive response. You don't find that odd.
It's not unusual, of course, but try a bit of walking in someone else's shoes. Let's say I - all 57 lardy years of me - slithered on ice beside your car. I'm OK, I'm back on my way by the time you get out. You check your wallet, hide the satnav, lock your door and I turn round to look at you, grinning. "Hey, handsome," I say, "Did you see my slip?!"
Does that seem perfectly normal to you?