Gosh the British are Polite

One day a few years ago I was walking to work at approximately 8:30am. Along the way a decent looking man of about 30 years of age  with nice salt & pepper coloured hair said to me in a British accent, "Hi there, I am so sorry to trouble you but may I ask you a question?"
"Sure" I responded.
He asked, "do you know of anywhere I might be able to get a pint of beer right now?"
I thought, "that's a bit of a weird question for this time of day" but then considered for a moment, and replied "I think this place called Vespa might be open" and proceeded to give the gentleman directions to it.
He thanked me and then enquired, "would you fancy joining me for a beer".
At this stage, I thought, "well this is getting a bit weird", so I started backing away and said, "No, sorry I have to get to work".
But, he pressed on, "are you sure? it will be fun?".
Well I do like beer but really I didn't know this fellow, it was an inappropriate time of day to go drink beer and I had to get to work. So I said, "yeah I'm sure sorry" and started walking away.
Then he called after me in his most polite British accent, "we could have some casual sex?"
I must admit the British accent did slow down my cognition of the creepiness upon me, but I managed to head off to work, albeit in a bit of a confused state.