I (20m) live in an apartment building that has a laundry room in the basement. Late at night i went down to the basement to do some laundry and put some of my clothes in the washer. Once the washing machine started going i turned off the lights and stuck my 8 inch dildo on it and hopped up onto the washer. I slid my tight hole down on my vibrating dildo and started bouncing up and down on it. It felt so fucking good, especially as the vibrations from the washer was making the dildo throb inside my hole. Knowing anyone could walk in and see me naked like this turned me on even more. I kept riding it faster till i came all over the floor. I took my dildo off the machine and by the time i was finished my clothes were ready for the dryer.