... and by "works", meaning, causes no damage.
If you are going to "wear" a pen cap, you will want one that is blunt
at the end which will push against your glans. If it does not cause significant discomfort over a couple of hours - or indeed the whole day - then it most certainly will not be "stretching it too much".
And indeed you will need to tape it in place (using a "medical" grade tape specified not to cause skin irritation).
For this purpose, pen caps are not ideal of course (but certainly
better than nothing), particularly as they are in general going to be too long
and therefore more likely to become entangled in underwear. If it is expendable (the pen ran out!) and of lightweight material, you can probably shorten it with a craft knife, or if heavier, use a fretsaw if you have that. File and/or sand off any rough edges.
If you can insert it with the larger end first, so much the better as the taper will tend to hold it in rather than expelling it. If you can not only do this but shorten it also, you will have a hollow tube and (with some limitations) be able to pee without removing it.
What you would be doing then is of course, to approximate the "flesh tunnels
" that have been discussed here before. When you realise what they are used for (though I personally find it a bit creepy
), you understand just how real it is that the concept of stretching must
inevitably work - if only people actually implement it.
As Jim says, retracting the foreskin is nowhere near as effective as getting something firmer - that pen cap or your fingers - inside
the foreskin opening so we encourage retraction as a "test" rather than an "exercise", in which case it need not be done every day and the test is to see just how much retraction gentle
pulling achieves. Anyway, we are not telling you not
to do it.
The point is that however firmly you retract, you would have some "reserve" - the ability to pull harder albeit with discomfort. You are pulling the foreskin back "like a sock" by pulling the skin ahead
of the tight part, because the penis skin is lengthwise, quite loose. If you "pop" the foreskin back over the "corona" - the widest part of the glans which happens to be at the back of it and which you will know as you have seen its shape through
the foreskin - then to get it forward, you pull the loose penile skin forward over your glans, grip it on each side with two fingers of both hands, adjusting the grip so as to hold it as near as possible to the tight band, and pull firmly forward. It will slip forward again even though it may take a little while.
The point is - if you could pull it back, then it can
be pulled forward again. "Paraphimosis" - getting "stuck" - only
occurs if you leave it back long enough for (significant
) swelling to occur, and that
only happens if the person is unable (and in the case of a child, perhaps too frightened) to perform the immediately obvious.
And you haven't forgotten the frænulum stretch, have you?