I think you misunderstand how to use this discussion board.
, by reading
the previous discussion "threads" on the current index page - the one you went to in order to post your new one, then you go the the next
index page and read those, and so on. By the time you have completely read a few dozen
such threads, you should have most of the information you need to know, and can ask about it.
In your case, the question just before yours
has already described the same situation, plus a few details about having sex which should not trouble you just yet, but you probably need to know for some
time in the future. In any case, you need to stretch, reading back will tell you how
(you only need the relatively easy way with your fingers), and take note that if you are complaining about your glans being "too sensitive", or trying to "tone it down" by any means, you are trying to do something very wrong
Go have a read, and then
tell us what you have figured out, eh?
The vein will not hurt you. Try hanging your hand down for a minute and look at the back of it. What do you see?