I work at a well know lingerie store in the mall. One night I saw a guy pass the store several times within a half hour of closing - he would look in but keep going. He finally came in about 10 minutes before closing and started looking at lingerie. At first he made me nervous, but then I saw that he was just shy and nervous himself. I asked if I could help him and he almost jumped out of his skin. He stammered that he was looking for something sexy for his GF but he knew nothing about lingerie. I asked him a bunch of questions and finally helped him select a very sheer outfit with a corset, stockings and gloves. Without even thinking I blurted out "Would you like to see what it looks like on?" He stared and stammered out "Uh sure, okay." I closed the gate to the store and turned out some lights and motioned him back by the dressing rooms. He waited outside while I changed. I was scared to death and wishing I had kept my mouth shut. I was also really, really turned on. Once I was dressed I called out "Ready?" He stuttered out a yes. I screwed up all my courage and walked out of the dressing room. My boobs and nipples were clearly visible through the sheer corset and the g-string panties were so see through I may as well have left them off. (And wet by now too). I turned a few times for him to see and said, "You like?" He just gulped and nodded. I noticed a pretty obvious bulge in his pants. I pointed to it and said "You need help with that?" He just nodded again. I got on my knees and took care of him orally. He finished pretty quickly. I then said be right back and went into the dressing room and changed back into my clothes. I brought out the outfit and told him he should probably have a different pair of panties because these were a bit soiled. I asked him if there was anything else I could help him with. He said no thanks and paid for the outfit. As I let him out of the store, he turned and asked if he could back to shop for Christmas - I said "Sure, it's a date!" I still can't believe I did it but I still get turned on thinking about it.