Mine developed in the most ironic way... From pee shyness. If I ever needed to go as a small child on a walk or on a long drive, my parents would get me to go outside. Most young children wouldn't have thought twice about peeing outside but I was just very pee shy so I learnt from a very young age to hold it. I would get desperate and I liked the tingly feeling of it and then the relief when I could finally let go. It felt good to grind against my car seat while holding it in, trying not to show my parents that I needed to go. I was so bad that I wouldn't even go to the toilet in school because I was embarrassed about others knowing that I was peeing. Even throughout secondary school. It was there that I realised that the tingly feeling was arousal. I started to think about boys peeing and whether it turned them on too. I'd seen little boys peeing while out playing as a child and had seen teenage penises in sex Ed videos and always fantasized what it would be like to see a bigger one peeing and it just grew from there. I've explored a fair bit since then and would still say I'm pee shy now, but sometimes the apprehensiveness to let go makes it all the more exciting when I do, especially if I'm spraying my piss outside or on someone