Anatomy Lesson

At the bath house. A guy in the sauna... he is giving me the eyes, I can see him looking up and down, from my face, to my cock. I walk over and stand in front of him. He reaches out to touch my belly, then my cock... I push his head forward by grasping the back of his skull with my hand, making it clear that I want him to suck. He does. 

I fuck his throat a while, making him semi-puke (I need a better word for that; slime, no actual vomit, but a hard gag) and then he looks up and asks if I'll fuck his ass. I do, at some considerable length and great depth, once again enjoying the amazing sensation of that second hole. And one thing I've learned to love doing, is out-loud, NOT A FUCKING WHISPER, dirty talk when I'm at some place like the baths. So I'm narrating like I'm in a porn film, "Yeah... FUCK that's tight, I love how that second hole feels on my cock head... dude, I know that hurts you, but is it alright if I keep doing it, because HOLEY FUCK JESUS, it is so amazing"... and yeah, he is struggling, but he admits it's pretty fucking hot and lets me keep banging him in the uppercunt (I like that. I'm not sure if it's original coinage, but I think I'll keep using it occasionally) and spanking his ass. After a while, we're both dripping with sweat, and the fuck has reached a decrescendo. I am in dire need of a drink of water; I've been panting hard and grunting, and my mouth is fucking parched. So I tell him we're gonna break and go get a drink, and reconvene in the maze where it's cooler, if he's up for it. I go out and get my cup of water, and he heads to the shower. I go back and step under a cool shower myself, enjoying the water making me almost shiver, but reducing the feverish feeling from brutally pounding ass in a sauna... and I start playing grab-ass with him. He says, "Hey, I'm sorry, but I think that just kind of wore me out. I'm done. I don't get this new fad... after TBRU, everybody seems to be all into this second-hole thing. It's hot, but it tears you up!" and I put on my little Professor Daddy hat, and I spake thusly: 

"OH! So... you've been fucked in the second hole, but you haven't done it to somebody? I can see how you wouldn't get why it feels good. So... (and I reached out, and started making imaginary drawn lines on his body, stroking his belly with my fingertip, like I was giving an anatomy lecture to the half-dozen guys in the shower area. Some of them had wandered out after watching us fucking.) see, your rectum goes up like this (making a firm stroke line up towards his navel )... and then the rectosigmoid junction turns like a u-joint downward, and then you have the sigmoid colon going like this," and as I'm talking, I'm touching him, like he's my display dummy, and I'm showing him where his own digestive/sexual anatomy is. I'm always amazed how many people really, honestly, have no idea. I mean, I get "point to your spleen" doesn't have a lot of application, but, whore, you USE your asshole, you should know more about it. ANYWAY, after I explained what it actually *IS* that I'm fucking... I explained WHY. 

(reaching out and taking his semi-erect [having anatomy taught in a public shower using your body is a surprisingly erotic experience for both teacher and dummy, apparently] penis in a firm circular grip at the base.... "See... his asshole is here, around the base of your dick." (taking the head of his rapidly stiffening cock in the cupped palm and fingers of the other hand) and THIS is where his rectosigmoid junction is kind of wrapped around your cockhead... remember, you're straightening out that U-joint... so it's kind of going like THIS (making a motion like a citrus juicer on his cockhead using all my fingers, and maybe there was some lube in there). 

"And you know how you felt that kind of painful stabby feeling up inside when I was fucking your second hole? So, that makes it do THIS (making a baby-bird-feeding gesture with all five fingers, stroking the cockhead intensely) while the pain from the stabbing, is making his asshole clench tight around the base of your cock," (demonstrated by clenching my fingers around the base of his shaft, where they'd been firmly gripped all along) - and he's writhing and squirming in the showers as half a dozen guys are watching me putting him on display as I use him like a fucking educational aide. 

I would have fucked him again for the practical portion of my class, if his hole wasn't already so worn out.