SO me and my friend Jill were hanging out this saturday...i was staying at her house, we were drinking, watching movies etc..in our jammies, which for her consisted of a tank top...we were being silly and ridiculous and she was making armpit farts and she said "I wonder if it would make the sound if you put your hand there" She knows I like tickling, I tickle her a lot just playfully, she had no idea what she was suggesting and that it would lead to this...I take her up on it and get behing her on the couch, wrap my legs around her waist, and she lifts her right arm, I put my left hand in her armpit, she's squrming already and she s tarts trying to make the noise but is giggly saying it tickles having my hand there, my hand get's "trapped" in her armpit and i s tart squeezing, she's trapped with my legs around her and she get my hand out out of there, i then start just moving my hand around in there and she is a total giggly mess. it was a lot of fun.