Medical exam

'I think first we'll get the enema kit out and then a speculum, just check what's going on in there, ok?'

She nodded happily, lips wrapped around the butt plug. He positioned her on the medical examination table such that her ass was hanging off the end, with her legs in stirrups. All the time she asked questions about how large the items were that he was going to use.

Firstly he squeezed warm water up her butt with a syringe, and asked her to push the liquid out into the metal tray he held. He could tell that she had excellent control of her sphincter and glute muscles for someone so young. She could open her ass on demand and push the water out in one go. Each time she asked 'Can we do that again, but with more water?' On the fifth go, when he'd put about a litre up her ass, he could see her abdominal region swelling with the extra fluid. 'How does that feel? he asked, expecting her to say uncomfortable, painful, or some such. 'It feels amazing!' she said. She really was a rare slut.

He asked her to turn over for the speculum. She gladly put her head down in doggy position and stuck her cute ass right out for him. She gaped all on her own, ready for the speculum, and he had no trouble inserting it and winding the mechanism to its maximum, opening her sphincter to a three of four centimeter diamter. It was a beautiful thing. 'Well Riley, you certainly aren't afraid of anal stimulation are you?' She didn't answer - she was busy frigging her clit. He got the medical torch out and had a good look around her rectal passage. Every time he place a hand on her butt cheeks she groaned. He unwound the speculum and asked her to sit. 'Oh god, Doctor, I was hoping you'd let me cum.' This girl was an unbelievable find, a true slut.

'Well Riley, I have found something unusual actually, a reason perhaps, that you're such an anal slut, and why you're so insatiable. Please don't be worried.' Riley had grabbed her knees and was hugging herself on the examination table. 'Instead of one G-spot in your rectum, you seem to have several, all over the walls of the passage itself, and I believe a couple very near the anus, the sphincter itself. G-spots are a mystery to science, some people don't seem to have one, some have several. You're too young to remember the film 'Deep Throat' - the pornstar has a g-spot in her throat. You have several in your ass - it is presumably your easiest route to orgasm, and multiple orgasm.'

'Is it dangerous, will I die?' said Riley. 'Of course not,' said the doctor, 'there is nothing medically wrong with you, there's nothing you need to do, but I can tell you to stop being worried about being being fucked or fucking your own ass. Obviously be careful about what you stick in there - I would advise against TV remotes for example. Stick to sex toys and cocks.'

She looked relieved. 'And what if I need something in my ass right now?'