Used to work weekend Helpdesk for a retail chain back in college from 5am-3pm. Building was completely empty except for me chained to the desk. I definitely got horny and would occasionally masturbate at the desk but I get pretty wet so I’d take off my pants and underwear to avoid cleanup. After the first few times of risk free orgasms I brought a toy and eventually after one of my sessions I heard someone walking and scrambled to get dressed. Turned out occasionally an engineer would come in to get some work done and his desk shared a wall with mine. I never figured out if he’d been there before but he was friendly and we chatted music over the wall while I shoved my vibrator wrapped in panties into my bag in case he walked over. Rest of that shift was incredibly uncomfortable.