I worked at Walgreen's photo lab in college. The three I remember where'

• total smokeshow developing nude pictures with a flag for her bf overseas
• a guy named Jeff who came in every single Saturday and spent $50 on 8x10 enlargements of pictures of Hooters waitresses he took. He'd regularly call me over to the kiosk to help when adjusting the color levels. I think it was part of the kink.
• a woman who asked "is it possible for you to print pictures without looking at them?" I said yes, but obvs I looked after she left. (Even film photos were stored digitally for 90 days to make reprints easier) It was before and after pictures of her mastectomy. I felt pretty bad for betraying her trust on that one, since they weren't naughty or illicit. I still showed them to my coworker, though. Boys will be boys.