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.
Mission accomplished.