Abandoned House and a Group of Tourists!

Just about one hour away from my hometown there is this huge abandoned industrial building! It has been abandoned about maybe 10 or 15 years ago and pretty much all of the stuff was left inside! So about 3 years ago i visited this place for the first time! (as you might know from my other stories I really love to get naked, wank and take pics pretty much everywhere) I entered through a back door that had already been broken up, walked through all the empty production hall, hallways and rooms to get to know the building and looking for interesting stuff to find! When I got to the locker rooms of the workers I discovered quite a huge amount of erotic or even porn posters, pretty much in every locker! This started to turn me on and the ambition of finding more porn also kicked in! Luckily my expectations weren´t disapointed at all! At the office rooms i found a lot of porn lying around pretty much everywhere! Even the former front desk of the company was pretty much covered with porn! Of course i just had to go for it, pulled my pants down, started wanking and shot my load over one of those pics! Of course i returned to this place quite a few times, getting more and more daring, starting to get completely naked, walk naked and wanking through the whole building, taking pics and cuming on the pics! (Cuming totally naked at a formerly pretty busy and very open front desk is quite a nice feeling) To my surprise i realised during my fourth visit (i think) that there where cum stains from somebody else on other pics too, and even weirder, there was some new porn lying around! Somehow the thought of somebody else also wanking there turned me on and i decided to also bring some porn pics to this place but also some of the pics that i had taken to let the others know what was going on :D! I still visit this place about 2 or 3 times a year, and there are pretty much allways new porn pics and new cum stains, but i have never met anyone or seen pics of him! Last month, i knew i would drive by this place on my way home from a businesstrip, so i decided to stop by for a visit! When i arrived at the building i saw quite a few cars and even a small bus parked on the road, which was pretty uncommon, since it was located in an pretty deserted industrial park. I walked around the corner and to my surprise there was a group of about 20 people, all between 20 and 40 (i guess) and about 12 men and 8 women! After a short conversation it turned out that the owner of the building had given the permission to some urban explorers for guided tours! It turned out that there where about 10 old buildings on their tour and it was the first time they did the whole tour! After a first shock, thinking about the fact that there where quite a few pics of my erection and a lot of my cum stains in there i kind of liked the thought of all those girls seeing it! So i asked if it was ok if i joined in since i wanted to have a look anyway! As expected it wasn´t a big deal! After a short introduction and a bit of history of the building the guide just said that there might be some inapropriate posters for some people and that luckily no kids where allowed on the tour! Looking at the others faces when he said that was just hilarious! After that the tour started through the same door that i had always taken! We walked through all the places i already had been naked and wanking, what a weird feeling! After the hall and some hallways we arrived at the locker rooms, where all the good stuff started! The guys looking at the lockers very interested while it was more giggling and eye rolling for the girls! Finally we arrived at the former office rooms, where a lot of cum stained porn and even 2 or 3 pics of my cock where lying around! The guide just comented it smiling, that it seemed to be a very "potent company"! I could see the guys joking around and some of the girls whispering stuf like "have you seen, even with stains on it" and such things! Others didn´t care, or didn´t see the pics! At last we arrived at the former front desk with all those beautiful stained porn and pics of my naked body with an erection standing in exactly the same pace! My heart was beating like hell, waiting for some reaktions! I could see the guys looking very closely at the porn pics, while most of the girls where just occasionally taking a look when suddenly one of the younger girls (i guess 25 or so) took a closer look and suddenly let out a pretty high "Aaaahh, those are cum stains" looking shocked and amused at the same time! Apparently she didn´t want to say it that loud, but now she and the pics got more attention then the guide! Another girl just comented smiling that there where even some pics of "that guy" naked and wanking! Another guy just said laughing: "Seems like he had quite some fun in here" me answering: "Luckily we didn´t catch him here!" everybody had a grat laugh! Of course there where also the expected "how gross" "what a pig" "can´t he do that at home" comments, but most of the people where amused or didn´t care! I espeacially liked one comment from one girl to her friend, but everybody could hear it: " At least he has a nice body" This was quite a weird situation! about 20 people and espeacially 8 women looking at and talking about my nude pics and my cum stains! What a weird but very arrousing feeling! Had quite some problems to not get hard!