Not sure if it's the naughtiest, but one that comes to mind was when I "borrowed" the large vibrator of a girl I was dating and fucked my ass with it in her bathroom while she was in the adjacent room watching tv. I left it in me while I jerked off, and it left me with my legs shaking. I'd never had anything in my ass before, and it definitely made an impression. From then on whenever I visited her, I'd take the opportunity to masturbate while stuffed with her toy if I thought I could get away with it. She never found out, though in retrospect I sort of wish I'd let her "discover" me. She might've done it for me or let me use it while we had sex. Oh well :/

My lifestyle could be considered naughty. I mean, seriously. A naked girl on the streets, completely shameless.

ate the last popsicle from the fridge.
>:3

In a threesome I did, two friends fucked and pissed my ass at the same time.

Well... I also sucked off my brother once. He shoved my face in his bare crotch, what else was I supposed to do?

Damn

I sent a dick pic to my mom accidentally.

While everyone else on the plane was fast asleep or engaged deeply in whatever movie they were watching, I downed a shot of Scotch to set the mood and jerked off to a movie with a hot actress underneath my blanket. No one suspected a thing.

I once did a full work out with one of my friends with a butt plug in for the whole thing. It was pretty interesting. Also my old boyfriend convinced me to go to a dinner party with a remote control vibrater in my pussy.

They do have what a girl wants, don't they? XP

I copied dvds illegally (' ')
(\_/)
That was a poorly done smile

Once, I ate a packet of crisps before dinner and nobody found out.

Fingered a girl in the back of her sister's car

Once stayed up until 5 AM.

Doin that right noWWWW OHHHHH YEAH.
We're renegades.

I once swam right after I ate.