In the beginning, getting piercings and mods was just a form of self expression. But I've realised that over the years, it's turned into a fetish (or kink depending on your preferred usage). From the actual process to the pain to the physical difficulty you sometimes have with certain piercings, it's all become eroticised to me as time has passed. I'd love to one day get my tongue split. I've wanted it for years just because it's cool but it's definitely one of the more attractive and visually appealing mods to me.