Sir, I have to take issue with both of these points:
I've been to Sefton Park many times and saw nothing remotely sex-maniac related (but then, I did always visit in daytime or perhaps I'm just not as good-looking as I thought ). It's a lovely park, much prettier and friendlier than my 'local' park when I spent a decade in Liverpool, Newsham.
I was climbing a tree in Newsham Park (as you do, when you're in your mid-twenties) and some inbred 'young, angry, unwanted' scouse girl walked to the bottom of my tree, and in that horrid nasal tone enhanced by a young lifetimes' worth of parental abuse screeched:
"Worrer you lukhin aht?"
"Er, nothing" was my surprised reply.
Well, she probably had a very difficult childhood, what with her mum and dad being brother and sister.
Is this the park at the end of Princes Road? That too is a lovely park. In the daytime at least. It's quite safe to walk through as well. Believe it or not, scallies and hoodies tend to stay away from parks, libraries, museums and other places that cultured and learned fellows such as you and I would frequent.
And I do like that Salvador Dali at the Liverpool Tate, no matter what you think