About the category for this: It is both MM and MF and biographical not fiction and it's about masturbation and maybe some about sexiology too.
The 'jacks' in this are me and my brother Sean, we are twins. We are country raised in the coastal southeast where the principal economy is farming, both agri and aqua. We just finished high school and are undecided about college, we aren't exactly your studious types and aren't too hot for the community college, we'd only be able to get in probably. We're big and strong but never had time for sports so not 'athletic', just a matched pair of big blond hicks. But enough about all that, this is about sex and particularly masturbation to which we introduced ourselves early on by virtue of very sufficient foreskins.
Yeah, Sean and me are the kind of twins that not only look alike but think alike and do about everything alike and together as though we were joined at the hip but we are not. Since early puberty (our 11th summer) Ma has pretty much let us be since we aren't into girls that much such as dating and necking regular, in fact that kissie feelie stuff hardly at all and we ain't never poked any yet. Guess that gets me to the 'Jill' in the story. Her name is Tracey and she's 17 now and moved in with her aunt down the creek about two years ago. There have never been many kids around here and she's as good on a shrimp boat as any boy so we got to know her pretty quick and we're best buddies.
She's near as tall as us, close to six foot and lanky like a boy but with nice titties. In fact she don't primp at all nor bother about some mighty hairy armpits. She's got to be one of us, crews with us and is around our house more than her own. Before I get more into the hot part of this I best say something about Ma cause this is about masturbation and she gets some into that. She got pregnant with us at just 17 and now is about only 36. She's pretty open about normal urges and such and has devoted herself to us and there never have been guys catting around here although she could have attracted a whole bunch.
It is hot where we live for most of the year scant clothing around the house is no big deal. So the female body was well seen by us as boys and as we started into sex at puberty masturbation was sort of a don't-ask-don't-tell thing between Ma and us. She knew we did it and we knew she did but never together with us. But Tracey became a different story.
The first summer on the boat she was 14 we 16. It began with skinny dipping during idle times between catches. We did it at first but soon Trace got up her nerve and joined in. Those early views of her perky tits and especially the heavy auburn pelt on her big cunt and those man-like pits caused us some great jackoffs in bed those nights after. And then naturally, the situation broke down in the close quarters on the boat quickly becoming the 'jacking and jilling' title of this. We learned the thrilling details of the sight, feel, smells of an aroused cunt and clit-wired nipples, and Trace got a dual demo of cock and overwhelming mass ejaculation of sperm. More about this later maybe but gotta go and come now!