Mercury he just assumed!
I am not sure why - we had a pleasant afternoon, but just general chat. When we parted he kissed my cheek and we both said something along the lines of it had been nice to meet the other, as you would.
Then he text and said how lovely I looked & wished he had more time with me, and it went from there. I replied to the first couple of texts but only in the sense of to thank him for compliment etc. I was trying to be non-commital but not ignore him entirely.
Yet he now seems to think he's odds-on for a shag 