I always knew i had an interest in tickling ever since i was very young. i always thought it really hot.
BUT i didn't know it was an actual kink. i knew foot fetishism existed, and i thought i had that at first.
but when my family got our first computer when i was 12, and i looked up 'tickle torture" in google. i was ECSTATIC this tickling was its' own separate kink.
from then on, i knew this was my primary turn-on.