GICL

Two guy perform 69 on each other while ever so slightly brushing the bottom of the partners sack with their tongue. Depending on the GICL level you can throw in a few tugs for good measure.

An aggressive form of sack play. The tickler stuffs a tickling device in their own anus, while the ticklee lays on their back with his legs spread - sometimes holding their ankles/toes to ensure maximum access. The tickler then squats over them and bounces up and down/side to side brushing the tickling device across the ticklee's (likely small) nutsack; similar to a tea bag motion. The two should be facing each other and staring deeply into one another's soul.

A BICL is when this is done with the tickler facing the opposite direction - a "bad idea" because he won't know if/when the ticklee is thinking about jamming the tickling device further up their ass.