When I was about 35, I had a nice looking married couple living next door to me. They were going on vacation and they asked me if I would check on their cat every few days to make sure she had enough food and water, and to clean the litter box at least once.
I went next door two days later to check on the cat. While I was there I happened to notice their bookshelf in the living room. I like to read so I was just browsing their books. I noticed a photo album tucked neatly between some of their books so being the curious sort I am, I pulled it out and flipped through the pages. There were the typical vacation pictures and some wedding pictures. All of a sudden I flipped a page and found some very artfully done pictures of my neighbor's wife in the nude! They weren't hard core pictures of her spread open for example, but she was still nude and in some her neatly trimmed pussy was quite visible. I was amazed at her beautiful breasts and large light brown nipples. Wow! I went rock hard in seconds.
I sat down on the couch and looked through the eight or nine pictures and studied her body for a long time. My dick was raging hard. I knew I had to lose my load looking at her body right then and there! I took my pants off and got some tissues from their bathroom. I sat on their couch and slowly jacked myself off looking at her. It was exciting doing that in their house, on their couch, as I studied her gorgeous body. I came in big spurts imagining she was there in person with me.
Instead of every other day, I checked on my neighbor's cat every day for the rest of the week! I jacked off looking at her every single day until they returned. When they returned they asked me if all was OK during the week and I smiled and said everything was FINE! From then on every time I saw my female neighbor I got a twinge in my dick, and I jacked off at home all the time fantasizing about her for years!