I was talking to my friend about weird fetishes and we both have very good trust in each other. He told me about how he jacks off to his goldfish. At first I thought he was joking, and I laughed it off, but then he blushed and went quiet. I knew instantly he was 100% serious. That's not the strange part, a couple days later I brought it up again and we talked about it more in depth. He told me he masturbates until he is about to climax, then pulls the fish out of the tank and puts it on the table. He then proceeds to ejaculate on the suffocating fish. As the fish slowly stops breathing, he puts it back into the tank. I'm scared as he gets older, he is going to intensify the fetish and do it to people.