hi guys so my method of stretching is using home made flesh tunnels out of polymorph. I have had slight success going from literally a millimeter to maybe 6 or 7. When I pull back when hard I can almost see the entire pee hole. but it seems like I can get past this point. The whole just isnt growing like it did before. I cant fit bigger flesh tunnels in because its not getting bigger, when I take the ones out I have in it seems like the skin just goes back to the same size it was at before. Any tips?

Try using the basic stretching exercise. Keep in mind that plateaus do occur to allow time for cells to grow, but once that is accomlished, there is no reason for the skin not to yield. Persist.

Keep working on it, continue using the device (whichever it is) as much as possible, don't let it "rest".