This happened a few days ago.

Recently, I bought a fairly large glass plug. I was playing with it on a weekday afternoon. It had been a few days since I'd had sex (GF and I had both been really busy), so I was VERY turned on. I thought I might shoot my load just feeling the width of that plug stretching me open and the big rounded tip slide over my g-spot.

So, the plug was in. I was just edging and playing and fucking myself with it for a while. Anyways, my roommate came home a little earlier than I expected, so I quickly cleaned up my room a bit and got dressed, leaving this girthy plug deep in my ass.

I went into the kitchen and we small-talked for a little bit. When I heard him come in I had been worried he'd somehow know what I was doing, but it was obvious he had no idea. So, at this point I feel like having something to drink (I was kind of tired from my masturbation, even though I didn't cum) and it occurs to me that we don't have anything in the fridge. There's water, sure, but idk, I need electrolytes. Juice or something.

So, having only used ANY butt toys 3 times before I decided to walk to the corner (there's a nice, kinda wanky whole foods type shop there), plugged. I could have taken it out, sure, but I didn't think it would be a big deal and didn't really want to do anything that might make my roommate think​ "hey, he's got something up his butt". So I picked up my keys and slipped on some shoes and went out.

It was kind of electrifying to take those first steps down the stairs of my building. I felt every sense on edge and the big, smooth, piece of glass putting incredible, erotic pressure on my g-spot and butthole. I was worried it would spread me and slip out at first but I could feel my butthole quivering around it and how big it was and stopped worrying. For the whole walk over it was just incredible, I had to bite my lip once or twice to stop from moaning.

My senses were on fire and these little jolts of erotic energy where pulsing through me. It was an absolutely incredible high, like a sexual adrenaline rush.

When I got into the store, though, the blood flow that had been moving my leg muscles started redirecting to my cock. As I was standing at the cooler, checking out the selection, I could feel a MASSIVE hard-on getting started. I was wearing jeans, but it must have still been kinda obvious. But whatever, you know, erections happen I'm not doing anything weird I'm sure it'll be fine, I'm kind of a regular, the cashier's seen me very hungover and now she's seen me horny, NBD. When I bent over to pick up a juice, though, something about the change of position really set me off. In the same second I felt a huge drop of precum run out of my cock, my balls pull up (like they do when you're about to cum hard), a wave of hot pleasure roll over my brain, and my ass felt soooo full in the best way possible.

It was so good I saw spots for a second. By the time I stood up I was blushing a little. I still don't know if I moaned or not.

Walking up to the cashier, every step was a mini-wave of that same feeling. It was all I could do to keep a straight face. As I walked home my throbbing erection started to subside a little, but by the time I got into my apartment, poured some juice, and went back into my room I still had a solid half-chub.

Needless to say, waiting for my roommate to go back out so I could finally shoot off was torture. In the end I got 7 big bursts of some of the thickest, whitest cum I've ever shot, and although I love my girlfriend I was thinking about someone shooting it into me!