While Pride should be a celebration of Britain’s vibrant LGBT community, we must also always remember that queer people still face discrimination, even across much of what we would consider the developed world.
Implicit in every catcall is a recognition that my existence in your world is limited to how much voyeuristic pleasure you can derive from my body. You are reminding me that by leaving my home I am apparently consenting to being sexualised by total strangers. It is symptomatic of a wider culture whereby female existence can be seen as a medium for male gratification.
A piece of Mozart most likely feels familiar, like you have heard it before and thus know what’s coming next, even if you haven’t and don’t. People like being right about things - they like being in control.