that's not the first time i felt colors. i've also felt sound, tasted colors, and felt flavors. it's my version of synaesthesia, which means the blending of senses. while synaesthetes usually don't experience such severe effects, drugs (especially psychedelics) can enhance their condition/gift. the tickle-waves and the full-body orgasm were just tactile hallucinations. i almost forgot, check out wikipedia.org and look up psychedelic experiences (or something like that). it'll explain different levels and it's scientifically trippy and a nutsack.