sexing tells you which plants will grow buds. only female plants grow buds. all the males do is make pollen sacks that pollenate the females, and when that happens, you get whatever kind of weed ur growing, be it mids or buds, full of seeds. and who wants some nice dank thats full of seeds? what most people do is just destroy them before they are producing pollen. pull em up and throw em away, burn them, make some hash out of them, whatever. the only reason you would keep a male is if you had some crucial plants and wanted to pollenate some plants later or to cross pollenate with another kind of bud. you cant revert a plant back to veg once its gone into flowering, im at least about 85% sure. it wont increase potency, it'll stunt the growth process of the buds if you try. you dont harvest male plants. they dont make buds. if u want to keep them, put them far away from the females in a different house or field, whatever, just far, you dont want any accidents, that pollen goes everywhere. just put some paper or plastic under the plant and act as if it was a female, as far as the light schedule goes. the pollen will fall to the floor. collect it and put it in a jar or something, put it in the freezer to save it for a while. you'll know when the female is ready to harvest by the color change observed in the hairs. they'll go from white to orange, brown, etc.. whatever you usually see on buds. when they change about 75-80%, harvest that mother. thats about it. good luck man