Hmm...I guess time will only tell. (:

I don't think there's nothing much you can do about them.

Maybe you could reduce the number of times or frequence you shave maybe.

I'm unsure.

Just keep using that lemon and another thing which I heard works is Gram Flour. Just mix it with alittle water into a thick paste & apply it, wait for 10 mins then rinse off in the shower. (:

I've heard that shaving with a duller razor can cause it so try and make sure that your using a good sharp razor.

Get an anal bleaching cream off ebay, it works on underarms, too.

http://cgi.ebay.com/ANAL-VAGINAL-UNDERARM-SKIN-LIG...

its the color of your skin, its not going to change. Accept yourself the way you are.