That was awesome! I've had a lot of memorable tickling experiences that included armpit tickling, but the one that stands out was my first time tying up my ex and tickling her. Now, I already knew that her pits were over the top ticklish so I figured that this was going to fun. I was right! Now, when I tie someone up for tickling, (which is pretty much the only reason that I would tie anyone up anyway), I tie them up tight! Not the way the 'lee's are tied in most of the vids you see! I had her ankles tied to the foot of the bed so about all she could do is wiggle them a little bit. Then I stretched her arms up over her head and secured them to the headboard, tightly! She really couldn't move at all. I then tickled her feet for a while, which was very fun. But that's not why you're reading this. I then went up and straddled her waist and unbuttoned her shirt and opened it up. Then I started teasing her. I told her how exposed and vulnerable her pits were. She cried out "ohhhh nooo"! Then I started wiggling all ten fingers and slowly approached both her pits at the same time. She started giggling and begging, then laughing. I steadily got closer and closer. Her laughing got more and more desperate. Then, once my fingers made contact with the pit skin, she screeched and began laughing hysterically until she went into silent laughter. I tickled all around and inside them for a while until I could tell she needed a break. I stopped and let her rest for a while. Funny enough, she never asked to be untied or to stop tickling her. And she had never been tickled like that or ever been tied up before. I tickled her pits a little more, then went back to her feet for a while. After that, I untied her and we made love. That was very good, more so than other times. The really cool part was, the next time she came over a few days later, she asked me if I wanted to tie her up again!
PS: My writing style isn't much to look at. So sue me!