Wow, reading all these stories I've been laughing pretty hard - I've never done anything quite like that! Well I'm still young, it could still happen haha
Some of the worst I probably did was when I was still in high school. I once walked around school with my friends posing sexy looks and saying "I'm _(my nickname)__alicious" and doing that finger in the mouth thing (ahem.. I think everyone knows what I mean) along with reeling off sexual innuendos
Continuing on with that, there was this random male visitor at my school and, being at a girls school and in a family of all girls, I took the opportunity to I blow up two balloons, shove them up my top and fold my arms underneath to push them up, resting them on a counter and trying to talk to this guy, who was altogether bemused and confused