EDIT: First time visiting a hooker
My experience with the memorable handjob by my busty friend in Pimlico provided plenty of wanking material for the following months. It was my default memory anytime I jerked off without porn and I'd replay it over and over, picturing those milky white tits and my cum glistening on them.
I moved to Finchley in North London not long after. My new place was big and soulless, my housemates friendly enough though. One of them was a girl called Sarah who was a bit chubby and had decent sized tits. She was timid and quiet and her boyfriend spent a lot of time at the house. I once caught a glimpse of her naked arse through her slightly ajar door. I stopped and looked but as quick as I had spotted it she had moved out of view. I would often find myself staring at her bosom when she wasn't looking, imagining my cum spraying as she wanked my hard dick. It was pure fantasy though. There was no way anything would happen there.