I may not be a doctor, but shaving generally isn't supposed to induce pain; unless you cut yourself. If the pain persists you should tell your mom, dad, or doctor. Maybe your blade found a sensitive area. In any case, pain in general should wear off in a few minutes unless you really screwed up; which in the case of a razor, is highly unlikely.
You probably just got razor burn. That's normal when you shave someplace new. In fact, you probably got something similar on your face the first time you shaved. Add to that that the skin down there is even more sensitive, and it's not hard to see why it happens. Just give it some time and it'll go away. If you keep shaving it the skin will toughen up and it won't happen so much anymore.
Granted, that's from shaving my face. I've never shaved down "their".
Chevre is right, it's just because you're new to shaving down there...It shouldn't last more than a day, and if you shave there a bit more regularly, your skin will toughen up...I can actually say this from experience...I don't know how accurate you are on saying most guys don't shave down there though...There are plenty of reasons other than being a TB to shave
When I first shaved down there, it itched for 2 or 3 days, and since then nothing. I don't do anything special or use any special cream. I certainly don't follow any of the tips on the internet, except for using a proper razor. Works for me.
I have shaved down there for a few years now. At first it itched a little but now I have no problems with itching or anything. I do get the occasional nick but that just happens when my razor gets away from me. As with the rest of us that shave down there we just love the smooth feel and look of it.:smile: