Imagine this scenario:
It's a hot summers day in London, you're feeling happy so you grab yourself a lunchtime beer on sit down in the park.
Half way through your beverage, you spot a girl sitting alone, sunbathing and reading a book.
Full of dutch courage and feeling smooth AF, you decide to go over to her and use a line.
"Excuse me..." You say, bending down on one need so she can see you better.
"Can you help me, I seem to have scraped my knee [point down to your leg] falling for you, do you have a plaster/bandaid?"
At this point, your smooth words will enter her brain and she will be frozen in time, trying to process such a masterful chat up line.
"Hahaha, very cute. Good one" she says, adjusting her body language and sitting up.
"Hey, I'm Dave... nice to meet you".
The line worked, you're in.