" Oh, that, umm, yeah." I was chock full of intellectual repartee."So we're discussing the underside, now look, see where the two ends of this irregul...ar circle come together? Well there are two important things to point out. First, and you probably know this part, this is the point where the foreskin is attached. Second," and at this point she used that delightful fingernail as a pointer once more, "this tiny area is easily the most sensitive spot on your entire body. I won't, but I bet I could. ..could not contain my self from slipping a small moan of a good feeling.she asked, are you enjoying this? i then answered yeess...that feels soo good....NA: would you like me to stroke it up and down for you? nice and firmly tight grip... i assure you, you will enjoy it.me: oh yes please do....NA: you have a nice big penis for a boy your age... i can imagine when your all grown up... have you ever have anyone kiss it for you??me: no never..NA: would you allow me to kiss the tip of your hard. Max is sweaty from chopping wood and Alice and I need a nice bath, too. Let's make it quick though, we have a lot to cover."We did make it quick. I limited my groping of Alice and Aunt Marti to a few quick breast squeezes and cunt fingerings. Alice and Aunt Marti limited their gropings to a few strokes of my cock.We once again retired to the cabin to continue our sex lessons. I got a little nervous when Aunt Marti reached into Alice's suitcase and hauled out a pair of what looked like cloth. "God! I want that beautiful cock of yours SO BAD right now!" He said.I began unzipping my slacks, and within a matter of moments, I'd tossed all of my clothes on the sofa behind Marvin, and as I did, he had hold of my balls in one hand, and with the other, he had hold of my, by now, fully erect cock! Without saying anything more, Marvin proceeded to suck my cock as if this was to be perhaps his last time to ever do so (and it was always like that with him)!I stood there, looking down at Marvin.