Truth be told, sometimes plain tickling just getss boringgg
although it can be fun to spend hours tickling and being tickled,
soon enough it gets repetative.
thats why having an edge to it like puttin a bet or some kind of rulls to it make it fun.
sometimes when me and my x girl were really bored we used to play Need for speed most wanted, and the loose of each round had to put his feet on the others lap and the other would tickle him throughout the entire race
god it was fun, except i suck at drivin games ^^(or maybe i intentionally lost?).
I guess tickling games just had a sort of spice to a relationship.