Continued..."You know, Hal, there's another way to cash in. You remember my friend Sally? She has asked me several times if I wanted to help her with her sex therapy practice. I've always said no because I figured you would freak out. But if you don't mind if I try that kind of work, then maybe." Hal's dick jumped up against my belly. Wow. He hadn't gotten hard again that quickly since his mid-twenties. "I don't mind at all. In fact, can I watch?" A few days later, after getting together with Sally, we worked out the deal. I would assist Sally on a part-time basis, and Hal would help out as one of the security guards who monitored the closed-circuit TV camaras. He wasn't going to be very highly compensated since he only wanted to monitor the camaras when I was working, but my generous hourly wage would more than make up for it. "And there will be tips," Sally said. "I do explain to the men that this isn't a whorehouse. It's a therapeutic and educational setting, but when customers are pleased with their treatment, they do tend to be very generous. "she also explained that many of her customers came to learn new sexual techniques that they couldn't explore with their wives. "If you can give instruction in anal intercourse, you'll get all the business you can handle," she added. Hal's eyes glinted, and the front of his trousers bulged. Why had I never realized that he was so turned-on by the thought of me with another man? I smiled and nodded. "I'm eager to get started, and Hal can tell you that I'm great at anal. Just watch me yourself on the monitor if you have any doubts." "I'm glad to hear it, because I have somebody on his way." she said. Hal found a newspaper and put it over his lap. I guess he didn't want anyone noticing how stiff he'd gotten. Then he settled behind the security counter and tested the camaras. I kissed him for good luck and then scooted into the examining room to change into a slinky robe that would slip away at a touch. My first customer was  younger than I had expected, considering the rates that Sally charged. She'd already informed me that younger men frequently enjoyed recieving sexual instruction from woman in their forties, but I'd been overwhelmed with information and it hadn't really registered. Now my eyes feasted on his lean, tall body and wide green eyes as he nervously stripped out of his clothes. "I've never done anal sex before," he confessed. "I feel like I'm expected to be an expert, and I don't want to screw it up when I do it for the first time with my new girlfriend." "Don't worry. You won't screw it up. I'll teach you everything you need to know. Come here." The small camara in the corner caught my eye, and I swallowed a smile, knowing that Hal was watching me embrace this hot-looking stranger. I put the young man's hands on my shoulders, and he shook only a little as he helped me out of my robe. "Wow! You look like a model," gushed the customer. Instead of an examining table, we had a king sized bed with crisp white sheets that were changed with every customer.......More to cum!